January 2007
Cisco Security Advisories
ID: 00028
Ref: 25/2007
Date: 11 January 2007:11:31:17
Version: 1
Title: Cisco Security Advisories
Abstract: DLSw Vulnerability and Unified Contact Center and IP Contact Center JTapi Gateway Vulnerability
Vendors affected: CISCO
Applications affected: CISCO
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Cisco Security Advisory: DLSw Vulnerability
Advisory ID: cisco-sa-20070110-dlsw
http://www.cisco.com/warp/public/707/cisco-sa-20070110-dlsw.shtml
Revision 1.0
For Public Release 2007 January 10 1600 UTC (GMT)
- - -----------------------------------------------------------------------
Summary
=======
A vulnerability exists in the Data-link Switching (DLSw) feature in Cisco IOS where an invalid value in a DLSw message could result in a reload of the DLSw device. Successful exploitation of this vulnerability requires that an attacker be able to establish a DLSw connection to the device.
There are workarounds available for this vulnerability, as detailed in the Workarounds section below.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20070110-dlsw.shtml
Affected Products
=================
Vulnerable Products
+------------------
This security advisory applies to all Cisco products that run Cisco IOS Software versions 11.0 through 12.4 configured for DLSw. A system which contains the DLSw feature, but does not have it enabled, is not affected.
A router which is configured for DLSw will have a line in the configurations defining a local DLSw peer. This definition can be seen by issuing the command "show running-config" and looking for lines similar to the following:
dlsw local-peer peer-id
To determine if DLSw is enabled on your Cisco IOS device, it is also possible to issue the "show dlsw statistics" command while in enable mode and look for output similar to:
Router#show dlsw statistics
DLSw+ Control Queue Statistics:
SNA Control Queue (count/max/dropped): (0/0/0)
Netbios Control Queue (count/max/dropped): (0/0/0)
Other Control Queue (count/max/dropped): (0/100/0)
Critical Control Queue (count/max): (0/0)
DLSw+ Border Peer Caching Statistics:
0 Border Peer Frames processed
0 Border frames found Local
0 Border frames found Remote
0 Border frames found Group Cache
A device which is not configured for DLSw will simply return to a command prompt with no output.
A device which does not support the DLSw feature will return output similar to:
Router#show dlsw statistics
^
% Invalid input detected at '^' marker.
Any version of Cisco IOS prior to the versions which will be listed in the Software Versions and Fixes section below may be vulnerable.
To determine the version of Cisco IOS software running on a Cisco product, log in to the device and issue the "show version" command to display the system banner. Cisco IOS Software will identify itself as "Internetwork Operating System Software" or simply "IOS". On the next line of output, the image name will be displayed between parentheses, followed by "Version" and the IOS release name.
Other Cisco devices will not have the "show version" command or will give different output.
The following example identifies a Cisco product running IOS release
12.3(6) with an installed image name of C3640-I-M:
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-I-M), Version 12.3(6), RELEASE SOFTWARE (fc3)
The next example shows a product running IOS release 12.3(11)T3 with an image name of C3845-ADVIPSERVICESK9-M:
Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version 12.3(11)T3,
RELEASE SOFTWARE (fc4)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Additional information about Cisco IOS release naming can be found at http://www.cisco.com/warp/public/620/1.html.
No other Cisco products are currently known to be affected by the vulnerability addressed in this advisory.
Products Confirmed Not Vulnerable
+--------------------------------
Products confirmed not to be vulnerable include devices which are not configured for DLSw.
Details
=======
Data-link switching (DLSw) provides a means of transporting IBM Systems Network Architecture (SNA) and network basic input/output system (NetBIOS) traffic over an IP network.
Establishing DLSw communications involves several operational stages.
1. In phase one, DLSw peers establish two TCP connections with each
other via TCP ports 2065 or 2067. Those TCP connections provide the
foundation for the DLSw communication.
2. After a connection is established, the DLSw partners exchange a
list of supported capabilities in phase two. This helps to ensure
that the peers use the same options. This is particularly vital
when the DLSw partners are manufactured by different vendors.
3. Next, the DLSw partners establish circuits between SNA or NetBIOS
end systems, and information frames can flow over the circuit.
A vulnerability exists in certain Cisco IOS software releases when configured for DLSw. After the connection is established, it is possible for a reload to occur should the device receive an invalid option during the capabilities exchange.
This vulnerability is documented in Cisco Bug ID CSCsf28840.
Vulnerability Scoring Details
+----------------------------
Cisco is providing scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS).
Cisco will provide a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.
Cisco PSIRT will set the bias in all cases to normal. Customers are encouraged to apply the bias parameter when determining the environmental impact of a particular vulnerability.
CVSS is a standards based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.
Cisco has provided an FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html.
Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss.
Cisco Bug IDs:
CSCsf28840
CVSS Base Score: 3.3
Access Vector: Remote
Access Complexity: Low
Authentication: Not Required
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Complete
Impact Bias: Normal
CVSS Temporal Score: 2.7
Exploitability: Functional
Remediation Level: Official Fix
Report Confidence: Confirmed
Impact
======
Successful exploitation of the vulnerability may result in a reload of
the device.
Software Version and Fixes
==========================
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to determine
exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center ("TAC") or your contracted
maintenance provider for assistance.
Each row of the Cisco IOS software table (below) describes a release
train and the platforms or products for which it is intended. If a
given release train is vulnerable, then the earliest possible releases
that contain the fix (the "First Fixed Release") and the anticipated
date of availability for each are listed in the "Rebuild" and
"Maintenance" columns. A device running a release in the given train
that is earlier than the release in a specific column (less than the
First Fixed Release) is known to be vulnerable. The release should be
upgraded at least to the indicated release or a later version (greater
than or equal to the First Fixed Release label).
For more information on the terms "Rebuild" and "Maintenance," consult
the following URL: http://www.cisco.com/warp/public/620/1.html.
+------------------------------------------------------------------------------+
| Major Release | Availability of Repaired Releases |
|-----------------------------+------------------------------------------------|
| Affected 12.0-Based Release | Rebuild | Maintenance |
|-----------------------------+------------------------------------------------|
| 12.0 | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0S | | 12.0(18)S |
|-----------------------------+------------------------------------------------|
| 12.0SZ | Vulnerable; migrate to 12.0(23)S or later |
|-----------------------------+------------------------------------------------|
| 12.0T | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0WC | 12.0(5)WC17; | |
| | available 29-Mar-07 | |
|-----------------------------+------------------------------------------------|
| 12.0XA | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XC | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XD | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XE | Vulnerable; migrate to 12.1(26)E8; available |
| | 20-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.0XG | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XH | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XI | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XJ | 12.0(4)XJ5 | |
|-----------------------------+------------------------------------------------|
| 12.0XK | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XN | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XQ | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XR | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.0XT | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| Affected 12.1-Based Release | Rebuild | Maintenance |
|-----------------------------+------------------------------------------------|
| 12.1 | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1AA | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| | 12.1(26)E8; | |
| | available 20-Jan-07 | |
|12.1E |---------------------+--------------------------|
| | 12.1(27b)E2; | |
| | available 25-Jun-07 | |
|-----------------------------+------------------------------------------------|
| 12.1EC | Vulnerable; migrate to 12.2(4)BC1 or later |
|-----------------------------+------------------------------------------------|
| 12.1EX | Vulnerable; migrate to 12.1(26)E8; available |
| | 20-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.1EZ | Vulnerable; migrate to 12.1(26)E8; available |
| | 20-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.1T | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XA | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XC | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XD | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XE | 12.1(1)XE1 | |
|-----------------------------+------------------------------------------------|
| 12.1XG | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1XH | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XI | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XJ | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1XM | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1XP | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1XQ | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1XS | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XT | 12.1(3)XT2 | |
|-----------------------------+---------------------+--------------------------|
| 12.1XV | 12.1(5)XV1 | |
|-----------------------------+------------------------------------------------|
| 12.1XW | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XX | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XY | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1XZ | Vulnerable; migrate to 12.2(43); available |
| | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.1YA | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1YB | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1YD | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.1YI | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| Affected 12.2-Based Release | Rebuild | Maintenance |
|-----------------------------+---------------------+--------------------------|
| 12.2 | | 12.2(43); available |
| | | 8-Mar-07 |
|-----------------------------+------------------------------------------------|
| 12.2B | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2BW | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2BY | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2DD | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2DX | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2IXA | Vulnerable; migrate to 12.2(18)IXC or later |
|-----------------------------+------------------------------------------------|
| 12.2IXB | Vulnerable; migrate to 12.2(18)IXC or later |
|-----------------------------+------------------------------------------------|
| 12.2MC | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2S | | 12.2(30)S |
|-----------------------------+---------------------+--------------------------|
| | 12.2(28)SB6; | |
| 12.2SB | available 12-Jan-07 | |
| |---------------------+--------------------------|
| | 12.2(31)SB2 | |
|-----------------------------+------------------------------------------------|
| 12.2SBC | Vulnerable; migrate to 12.2(31)SB2 or later |
|-----------------------------+------------------------------------------------|
| 12.2SRA | 12.2(33)SRA2 | |
|-----------------------------+------------------------------------------------|
| 12.2SU | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2SV | | 12.2(26)SV |
|-----------------------------+---------------------+--------------------------|
| 12.2SW | 12.2(25)SW9; | |
| | available 29-Jan-07 | |
|-----------------------------+------------------------------------------------|
| 12.2SX | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2SXA | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2SXB | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2SXD | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2SXE | 12.2(18)SXE6b; | |
| | available 31-Jan-07 | |
|-----------------------------+---------------------+--------------------------|
| 12.2SXF | 12.2(18)SXF8; | |
| | available 9-Mar-07 | |
|-----------------------------+------------------------------------------------|
| 12.2SY | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2SZ | Vulnerable; migrate to 12.2(30)S or later |
|-----------------------------+------------------------------------------------|
| 12.2T | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2TPC | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.2XA | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XB | 12.2(2)XB17 | |
|-----------------------------+------------------------------------------------|
| 12.2XC | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2XD | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XG | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XH | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XJ | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XK | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XL | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XM | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XN | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XQ | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XT | Vulnerable; migrate to 12.3(21) or later | |
|-----------------------------+------------------------------------------------|
| 12.2XU | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XV | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2XW | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YA | 12.2(4)YA10 | |
|-----------------------------+------------------------------------------------|
| 12.2YB | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YC | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YD | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YE | Vulnerable; migrate to 12.2(30)S or later |
|-----------------------------+------------------------------------------------|
| 12.2YF | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YH | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YJ | 12.2(8)YJ1 | |
|-----------------------------+------------------------------------------------|
| 12.2YL | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YM | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YN | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YT | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2YU | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YV | 12.2(11)YV1 | |
|-----------------------------+------------------------------------------------|
| 12.2YW | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YX | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YY | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2YZ | Vulnerable; migrate to 12.2(30)S or later |
|-----------------------------+------------------------------------------------|
| 12.2ZA | Vulnerable; migrate to 12.2(18)SXE6b; |
| | available 31-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2ZB | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2ZD | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.2ZE | Vulnerable; migrate to 12.3(21) or later |
|-----------------------------+------------------------------------------------|
| 12.2ZF | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2ZH | 12.2(13)ZH6 | |
|-----------------------------+------------------------------------------------|
| 12.2ZJ | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2ZL | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.2ZN | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.2ZP | Migrate to 12.2(20)S7 or later |
|-----------------------------+------------------------------------------------|
| 12.2ZU | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.2ZV | 12.2(28a)ZV1 | |
|-----------------------------+------------------------------------------------|
| 12.2ZW | Vulnerable; migrate to 12.2(33)SRB; available |
| | 22-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.2ZX | | 12.2(28)ZX |
|-----------------------------+---------------------+--------------------------|
| Affected 12.3-Based Release | Rebuild | Maintenance |
|-----------------------------+---------------------+--------------------------|
| 12.3 | | 12.3(21) |
|-----------------------------+------------------------------------------------|
| 12.3B | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3BW | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3T | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XA | 12.3(2)XA5 | |
|-----------------------------+------------------------------------------------|
| 12.3XB | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XC | 12.3(2)XC3 | |
|-----------------------------+------------------------------------------------|
| 12.3XD | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XE | 12.3(2)XE2 | |
|-----------------------------+------------------------------------------------|
| 12.3XF | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XG | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.3XH | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XI | 12.3(7)XI8a | |
|-----------------------------+------------------------------------------------|
| 12.3XJ | Vulnerable; migrate to 12.4(11)T1; available |
| | 8-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.3XK | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XQ | Vulnerable; migrate to 12.4(12) or later |
|-----------------------------+------------------------------------------------|
| 12.3XR | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.3XU | Vulnerable; migrate to 12.4(4)T7 or later |
|-----------------------------+------------------------------------------------|
| 12.3XW | Vulnerable; migrate to 12.4(11)T1; available |
| | 8-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.3XX | 12.3(8)XX2 | |
|-----------------------------+------------------------------------------------|
| 12.3YF | Vulnerable; migrate to 12.4(11)T1; available |
| | 8-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.3YG | 12.3(8)YG5 | |
|-----------------------------+------------------------------------------------|
| 12.3YH | Vulnerable; migrate to 12.4(4)T7 or later |
|-----------------------------+------------------------------------------------|
| 12.3YI | Vulnerable; migrate to 12.4(4)T7 or later |
|-----------------------------+------------------------------------------------|
| 12.3YJ | Vulnerable; migrate to 12.4(6)T6 or later |
|-----------------------------+------------------------------------------------|
| 12.3YK | Vulnerable; migrate to 12.4(4)T7 or later |
|-----------------------------+------------------------------------------------|
| 12.3YM | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.3YQ | Vulnerable; migrate to 12.4(6)T6 or later |
|-----------------------------+------------------------------------------------|
| 12.3YT | Vulnerable; migrate to 12.4(4)T7 or later |
|-----------------------------+------------------------------------------------|
| 12.3YU | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.3YX | Vulnerable; migrate to 12.4(11)T1; available |
| | 8-Jan-07 |
|-----------------------------+------------------------------------------------|
| 12.3YZ | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| Affected 12.4-Based Release | Rebuild | Maintenance |
|-----------------------------+---------------------+--------------------------|
| | 12.4(7d); available | |
| | 4-Jan-07 | |
|12.4 |---------------------+--------------------------|
| | 12.4(8c) | |
| |---------------------+--------------------------|
| | 12.4(10a) | 12.4(12) |
|-----------------------------+---------------------+--------------------------|
| | 12.4(4)T7 | |
| |---------------------+--------------------------|
| | 12.4(6)T6 | |
| |---------------------+--------------------------|
| 12.4T | 12.4(9)T3; | |
| | available 12-Mar-07 | |
| |---------------------+--------------------------|
| | 12.4(11)T1; | |
| | available 8-Jan-07 | |
|-----------------------------+------------------------------------------------|
| 12.4XA | Vulnerable; migrate to 12.4(6)T6 or later |
|-----------------------------+------------------------------------------------|
| 12.4XB | Vulnerable; contact TAC |
|-----------------------------+------------------------------------------------|
| 12.4XC | 12.4(4)XC6; | |
| | available 29-Jan-07 | |
|-----------------------------+---------------------+--------------------------|
| 12.4XD | 12.4(4)XD5 | |
|-----------------------------+------------------------------------------------|
| 12.4XE | Vulnerable; contact TAC |
+------------------------------------------------------------------------------+
Workarounds
===========
The effectiveness of any mitigation or fix is dependent on specific
customer situations such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied mitigation or
fix is the most appropriate for use in the intended network before it
is deployed.
Additional mitigations that can be deployed on Cisco devices within the
network are available in the Cisco Applied Intelligence companion
document for this advisory:
http://www.cisco.com/warp/public/707/cisco-air-20070110-dlsw.shtml
Configure Explicitly Defined DLSw Peers
+--------------------------------------
If DLSw is configured with no remote peers defined, then it must be
operating in promiscuous mode on one end of the connection. Promiscuous
mode could allow for any device to attempt to establish a DLSw peer
with the router. To prevent malicious connections, DLSw peers may be
explicitly defined with the "dlsw remote-peer" command removing the need
for promiscuous mode.
Obtaining Fixed Software
========================
Cisco will make free software available to address this vulnerability
for affected customers. This advisory will be updated as fixed software
becomes available. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature
sets they have purchased. By installing, downloading, accessing
or otherwise using such software upgrades, customers agree to
be bound by the terms of Cisco's software license terms found
at http://www.cisco.com/public/sw-license-agreement.html,
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.
Do not contact either "psirt@cisco.com" or "security-alert@cisco.com"
for software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through their
regular update channels. For most customers, this means that upgrades
should be obtained through the Software Center on Cisco's worldwide
website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through prior
or existing agreement with third-party support organizations such as
Cisco Partners, authorized resellers, or service providers should
contact that support organization for guidance and assistance with the
appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but who do not hold a Cisco
service contract and customers who purchase through third-party vendors
but are unsuccessful at obtaining fixed software through their point of
sale should get their upgrades by contacting the Cisco Technical
Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Have your product serial number available and give the URL of this
notice as evidence of your entitlement to a free upgrade. Free upgrades
for non-contract customers must be requested through the TAC.
Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
for additional TAC contact information, including special localized
telephone numbers and instructions and e-mail addresses for use in
various languages.
Exploitation and Public Announcements
=====================================
This vulnerability was reported to Cisco by Martyn Ruks of MWR
InfoSecurity and was originally presented at DEFCON in August 2006.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT
YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an uncontrolled
copy, and may lack important information or contain factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20070110-dlsw.shtml
In addition to worldwide web posting, a text version of this notice is
clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-teams@first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on mailing
lists or newsgroups. Users concerned about this problem are encouraged
to check the above URL for any updates.
Revision History
================
+----------------------------------------+
| Revision | | Initial |
| 1.0 | 2007-January-10 | public |
| | | release |
+----------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities
in Cisco products, obtaining assistance with security
incidents, and registering to receive security information
from Cisco, is available on Cisco's worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding
Cisco security notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.
- - -----------------------------------------------------------------------
All contents are Copyright 1992-2007 Cisco Systems, Inc. All rights
reserved.
- - -----------------------------------------------------------------------
Updated: Jan 10, 2007 Document ID: 77859
- - -----------------------------------------------------------------------
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Hash: SHA1
Cisco Security Advisory: Cisco Unified Contact Center and IP Contact Center JTapi Gateway Vulnerability
Advisory ID: cisco-sa-20070110-jtapi
http://www.cisco.com/warp/public/707/cisco-sa-20070110-jtapi.shtml
Revision 1.0
For Public Release 2007 January 10 1600 UTC (GMT)
- - ---------------------------------------------------------------------
Contents
Summary
Affected Products
Details
Impact
Software Version and Fixes
Workarounds
Obtaining Fixed Software
Exploitation and Public Announcements
Status of this Notice:FINAL
Distribution
Revision History
Cisco Security Procedures
- - ---------------------------------------------------------------------
Summary
=======
Cisco Unified Contact Center Enterprise, Cisco Unified Contact Center Hosted, Cisco IP Contact Center Enterprise, and Cisco IP
Contact Center Hosted editions are affected by a vulnerability that may result in the restart of JTapi Gateway process. Until this
process restarts, no new connections can be processed. Existing connections will continue to work.
Cisco Unified Contact Center Express and Cisco IP Contact Center Express are not affected by this vulnerability.
Cisco has made free software available to address this vulnerability for affected customers.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20070110-jtapi.shtml.
Affected Products
=================
Vulnerable Products
+------------------
All versions of Cisco Unified Contact Center Enterprise, Cisco Unified Contact Center Hosted, Cisco IP Contact Center Enterprise,
and Cisco IP Contact Center Hosted editions are affected.
Products Confirmed Not Vulnerable
+--------------------------------
* Cisco Unified Contact Center Express and Cisco IP Contact Center
Express editions are not affected.
* Cisco Unified Intelligent Contact Management Enterprise and
Hosted are not affected.
No other Cisco products are known to be affected by this vulnerability.
Details
=======
Cisco Unified Contact Center Enterprise (formerly Cisco IP Contact Center [IPCC] Enterprise), an integral component of the Cisco
Unified Communications system, provides intelligent routing and call treatment with blending of multiple communication channels.
Cisco Unified Contact Center Hosted (formerly known as Cisco IP Contact Center [IPCC] Hosted) is a platform that enables customers
to move to a Customer Interaction Network. The Customer Interaction Network is a distributed, IP-based customer service
infrastructure comprising a suite of multichannel services and customer relationship management applications.
A vulnerability exists in all versions of Cisco Unified Contact Center Enterprise, Cisco Unified Contact Center Hosted, Cisco IP
Contact Center Enterprise, and Cisco IP Contact Center Hosted editions that may result in the restart of JTapi Gateway process. The
restart of this process can take up to several minutes and during this time no new calls can be processed. Existing calls continue
to work. If the system is deployed in a redundant way, the redundant system will take over preventing a loss of service. However the
JTapi Gateway on the redundant system can also be restarted by exploiting the same vulnerability.
To exploit this vulnerability, an attacker will need to complete a 3-way TCP handshake to the JTapi server port. This port number
can be dependent on how the product is deployed and whether there is a redundant pair of servers. It can be found in the Windows
registry by looking up the jtapiServerPortNumber value in the Windows Registry, located at:
* HKEY_LOCAL_MACHINE\SOFTWARE\Cisco Systems, Inc.\ICM\
[instanceName]\PG[Number][A/B]\PG\CurrentVersion\JGWS\jgw[number]
\JGWData\Config.
Vulnerability Scoring Details
+----------------------------
Cisco is providing scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). Cisco
will provide a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the
vulnerability in individual networks. Cisco PSIRT will set the bias in all cases to normal. Customers are encouraged to apply the
bias parameter when determining the environmental impact of a particular vulnerability.
CVSS is a standards based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.
Cisco has provided a FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html.
Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
https://intellishield.cisco.com/security/alertmanager/cvss.
Cisco Bug IDs:
CSCsh15483 (registered customers only) - Third party connects to JGW's TCP port, JGW asserts and fails over.
CVSS Base Score: 3.3
- - - Access Vector: Remote
- - - Access Complexity: Low
- - - Authentication: Not Required
- - - Confidentiality Impact: None
- - - Integrity Impact: None
- - - Availability Impact: Complete
- - - Impact Bias: Normal
CVSS Temporal Score: 2.7
- - - Exploitability: Functional
- - - Remediation Level: Official Fix
- - - Report Confidence: Confirmed
Impact
======
Successful exploitation of the vulnerability may result in the restart of JTapi Gateway process. Restarting this process can take
several minutes and during this time no new calls can be processed.
Existing calls continue to work without any problems.
Software Version and Fixes
==========================
When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure
and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported properly by the new release. If the information is not clear,
contact the Cisco Technical Assistance Center ("TAC") or your contracted maintenance provider for assistance.
+---------------------------------------+
| Software | Patch | Maintenance |
| Release | | |
|----------+------------+---------------|
| 5.0 | ICM5.0(0) | |
| | _SR13_ES18 | |
|----------+------------+---------------|
| | ICM6.0(0) | 6.0SR10 |
| 6.0 | _SR8_ES3 | (Available |
| | | April 2007) |
|----------+------------+---------------|
| 7.0 | ICM7.0(0) | |
| | _SR4_ES43 | |
|----------+------------+---------------|
| | ICM7.1(3) | 7.1(4) |
| 7.1 | _ES5 | (Available |
| | | March 2007) |
+---------------------------------------+
Maintenance releases can be downloaded at:
http://tools.cisco.com/support/downloads/go/MDFTree.x?butype=cc
ICM5.0(0)_SR13_ES18 can be downloaded at:
http://www.cisco.com/cgi-bin/tablebuild.pl/d4b330d7b9c07d33f2833e1be69c6145
6.0.00_SR08_ES3 can be downloaded at:
http://www.cisco.com/cgi-bin/tablebuild.pl/48b796a9ba353f2d02897ae3e6bb1140
7.0.00_SR04_ES43 can be downloaded at:
http://www.cisco.com/cgi-bin/tablebuild.pl/47564eac9ea7b12357226a5f20bbbd66
7.1.03_ES5 can be downloaded at:
http://www.cisco.com/cgi-bin/tablebuild.pl/9df0152592e9779b3f9e8701a94e4422
Workarounds
===========
No workarounds exist for this vulnerability. The following general mitigation actions are relevant for this vulnerability: Ensuring
the Cisco Unified Contact Center or Cisco IP Contact Center is physically or logically separated from the data network and isolated
from the Internet which will limit the exposure to the exploitation of the vulnerability from the Internet or internal data
networks.
Apply access control lists (ACLs) on routers, switches, and firewalls installed in front of the vulnerable network device such that
TCP/IP traffic destined for the Cisco Unified Contact Center or Cisco IP Contact Center is allowed only from trusted sources. Refer
to http://www.cisco.com/warp/public/707/tacl.html for examples on how to apply ACLs on Cisco routers.
Obtaining Fixed Software
========================
Cisco will make free software available to address this vulnerability for affected customers. This advisory will be updated as fixed
software becomes available. Prior to deploying software, customers should consult their maintenance provider or check the software
for feature set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at
http://www.cisco.com/public/sw-license-agreement.html, or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.
Do not contact either "psirt@cisco.com" or "security-alert@cisco.com"
for software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through prior or existing agreement with third-party support organizations
such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and
assistance with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific customer situations such as product mix, network topology,
traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with
their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the
intended network before it is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but who do not hold a Cisco service contract and customers who purchase through third-party
vendors but are unsuccessful at obtaining fixed software through their point of sale should get their upgrades by contacting the
Cisco Technical Assistance Center (TAC). TAC contacts are as follows:
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Have your product serial number available and give the URL of this notice as evidence of your entitlement to a free upgrade. Free
upgrades for non-contract customers must be requested through the TAC.
Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
for additional TAC contact information, including special localized telephone numbers and instructions and e-mail addresses for use
in various languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
This vulnerability was reported to Cisco by a customer.
Status of this Notice:FINAL
===========================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT
IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at :
http://www.cisco.com/warp/public/707/cisco-sa-20070110-jtapi.shtml
In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to
the following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-teams@first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2007-Jan-10 | public |
| | | release |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available on Cisco's worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.
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