April 2006
Three Cisco Security Advisories: 1. cisco-sa-20060419-wlse - Multiple Vulnerabilities in the WLSE Appliance 2. cisco-sa-20060419-xr - Cisco IOS XR MPLS Vulnerabilities 3. Response to Privilege Escalation on Multiple Cisco Products
ID: 00296
Ref: 294/2006
Date: 20 April 2006:14:09:38
Version: 1
Title: Three Cisco Security Advisories: 1. cisco-sa-20060419-wlse - Multiple Vulnerabilities in the WLSE Appliance 2. cisco-sa-20060419-xr - Cisco IOS XR MPLS Vulnerabilities 3. Response to Privilege Escalation on Multiple Cisco Products
Abstract:
Vendors affected: Cisco
Operating systems affected: Cisco
Applications affected: Cisco
Title
=====
Three Cisco Security Advisories:
1. cisco-sa-20060419-wlse - Multiple Vulnerabilities in the WLSE Appliance
2. cisco-sa-20060419-xr - Cisco IOS XR MPLS Vulnerabilities
3. Response to Privilege Escalation on Multiple Cisco Products
Detail
======
1. CiscoWorks WLSE is a centralized, systems-level application for
managing and controlling an entire autonomous Cisco WLAN
infrastructure.
Two vulnerabilities exist in the WLSE appliance that may allow an
attacker to gain complete control of the device or to obtain access
to the underlying operating system.
2. Cisco IOS XR Software is a member of the Cisco IOS Software Family
that uses a microkernel based distributed operating system
infrastructure. Cisco IOS XR runs both on Cisco CRS-1 and Cisco 12000
series routers.
3. This is Cisco PSIRT's response to the privilege escalation
vulnerability independently announced by Adam Pointon of
Assurance.com.au and Mathieu Pepin of Axen Consulting. We would like
to thank both Adam and Mathieu for bringing this issue to our
attention.
1.
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Cisco Security Advisory: Multiple Vulnerabilities in the WLSE
Appliance
Advisory ID: cisco-sa-20060419-wlse
http://www.cisco.com/warp/public/707/cisco-sa-20060419-wlse.shtml
Revision 1.0
For Public Release 2006 April 19 1500 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
=======
There are two vulnerabilities that exist in the CiscoWorks Wireless
LAN Solution Engine (WLSE). The first is a cross site scripting (XSS)
vulnerability that may allow an attacker to gain administrative
privileges on the system. The second is a local privilege escalation
vulnerability that can be used by an attacker who already has
authenticated access to the command line interface to obtain access
to the underlying operating system.
Cisco has made free software available to address this vulnerability
for affected customers.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20060419-wlse.shtml
Affected Products
=================
Vulnerable Products
+------------------
A CiscoWorks Wireless LAN Solution Engine (WLSE) or WLSE Express
running any version of software prior to 2.13 are vulnerable to both
of these vulnerabilities.
Several other Cisco products are affected only by the local privilege
escalation vulnerability, including Cisco Hosting Solution Engine
(HSE), User Registration Tool (URT), Cisco Ethernet Subscriber
Solution Engine (ESSE) and CiscoWorks2000 Service Management
Solution. A separate Cisco Security Response has been published
regarding the impact and the fixes on these products and can be found
at http://www.cisco.com/warp/public/707/cisco-sr-20060419-priv.shtml
Products Confirmed Not Vulnerable
+--------------------------------
No other Cisco products are affected by both of these
vulnerabilities.
Details
=======
CiscoWorks WLSE is a centralized, systems-level application for
managing and controlling an entire autonomous Cisco WLAN
infrastructure.
Two vulnerabilities exist in the WLSE appliance that may allow an
attacker to gain complete control of the device or to obtain access
to the underlying operating system.
These issues are documented by the following Cisco bug IDs:
* CSCsc01095 (registered customers only) - Cross site scripting
vulnerability in WLSE appliance web interface
This fix addresses the cross site scripting (XSS) vulnerability
in the WLSE appliance web user interface. By exploiting this
vulnerability, an attacker may obtain the session cookie
information and further use this information to gain
administrative privileges on the system.
* CSCsd21502 (registered customers only) - Privilege escalation to
Linux shell
This fix addresses the local privilege escalation from the
command line interface of the WLSE appliance. By exploiting this
vulnerability an attacker who already has authenticated access to
the command line interface may inject a command to obtain a shell
account on the underlying operating system.
Impact
======
By exploiting these vulnerabilities together, an attacker may obtain
complete control of the WLSE appliance.
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.
These vulnerabilities are fixed in the 2.13 version of WLSE software.
Fixed software can be downloaded from the following URL:
http://www.cisco.com/cgi-bin/tablebuild.pl/wlan-sol-eng
Workarounds
===========
There are no workarounds for these vulnerabilities.
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 malicious use of the vulnerability
described in this advisory.
This vulnerability was reported to Cisco by Adam Pointon of
Assurance.Com.Au. We would like to thank Adam Pointon for bringing
this to our attention.
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-20060419-wlse.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 | 2006-April-19 | 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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Cisco Security Advisory: Cisco IOS XR MPLS Vulnerabilities
Advisory ID: cisco-sa-20060419-xr
http://www.cisco.com/warp/public/707/cisco-sa-20060419-xr.shtml
Revision 1.0
For Public Release 2006 April 19 1500 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
=======
Multiple Multi Protocol Label Switching (MPLS) related
vulnerabilities exist on Cisco IOS XR. Only systems that are running
Cisco IOS XR and configured for MPLS are affected by these
vulnerabilities.
Upon successful exploitation a Modular Services Card (MSC) on a Cisco
Carrier Routing System 1 (CRS-1) or a Line Card (LC) on a Cisco 12000
series router may reload affecting switched traffic.
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-20060419-xr.shtml.
Affected Products
=================
Vulnerable Products
+------------------
Only systems that are running Cisco IOS XR and configured for MPLS
are affected by this vulnerability.
Systems that are running Cisco IOS XR and configured for MPLS can be
identified by the show mpls interfaces command. A sample output of
this command on a CRS-1 that is configured for MPLS is given below.
RP/0/RP1/CPU0:crs1#show mpls interfaces
Interface LDP Tunnel Enabled
-------------------------- -------- -------- --------
POS0/2/0/0 Yes Yes Yes
POS0/2/0/1 No Yes Yes
POS0/2/0/2 Yes No Yes
POS0/2/0/3 Yes Yes Yes
GigabitEthernet0/3/1/0 Yes No Yes
GigabitEthernet0/3/1/3 Yes No Yes
POS0/3/0/1 Yes Yes Yes
TenGigE0/6/0/0 Yes No Yes
RP/0/RP1/CPU0:crs#
In the above output, the fourth column labeled Enabled identifies
MPLS enabled interfaces.
Products Confirmed Not Vulnerable
+--------------------------------
Cisco IOS XR only runs on CRS-1 or Cisco 12000 series routers. Other
Cisco products, including systems that run Cisco IOS are not
affected.
Details
=======
Cisco IOS XR Software is a member of the Cisco IOS Software Family
that uses a microkernel based distributed operating system
infrastructure. Cisco IOS XR runs both on Cisco CRS-1 and Cisco 12000
series routers.
More information on Cisco IOS XR can be found at the following URL:
http://www.cisco.com/en/US/products/ps5845/index.html
Modular Services Cards (MSC), also called the line cards are Layer-3
forwarding engines on Cisco CRS-1. An MSC is paired with a physical
layer interface module (PLIM) which provides layer-1 and layer-2
services.
More information on Cisco CRS-1 architecture can be found at the
following URL:
http://www.cisco.com/en/US/products/ps5763/index.html
Specific MPLS packets that are switched by a Cisco CRS-1 or a 12000
series system will restart the NetIO process. If the NetIO process is
restarted several times consecutively, the line card will reload
causing a Denial of Service (DoS) condition for the traffic that is
being switched on that line card.
MPLS packets will be forwarded through the MPLS network. Therefore,
packets that can trigger this vulnerability can be sent from remote
systems that are in the MPLS network. Such packets can not be
received on interfaces that are not configured for MPLS.
This vulnerability is addressed by the following Cisco bug IDs:
* CSCsd15970 -- MSC crash upon receipt of specific MPLS packets
This bug only affects CRS-1 and does not affect Cisco 12000
series routers that are running Cisco IOS XR.
* CSCsd55531 -- MPLS packet handling problems
This bug only affects CRS-1 and does not affect Cisco 12000
series routers that are running Cisco IOS XR.
* CSCsc77475 -- Line card crash upon receipt of specific MPLS
packets
This bug affects both CRS-1 and Cisco 12000 series routers that
are running Cisco IOS XR.
Impact
======
Successful exploitation of the vulnerability may result in a reload
of the Modular Services Card (MSC) on a CRS-1 or the line cards on a
Cisco 12000 series router. Repeated exploitation could result in a
sustained DoS attack.
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.
+---------------------------------------+
| Cisco IOS XR | SMU ID |
| Version | |
|---------------+-----------------------|
| 3.2.0 | AA01447 |
|---------------+-----------------------|
| 3.2.1 | AA01446 |
|---------------+-----------------------|
| 3.2.2 | AA01448 |
|---------------+-----------------------|
| 3.2.3 for | AA01444 |
| CRS-1 | |
|---------------+-----------------------|
| 3.2.3 for PRP | AA01451 |
|---------------+-----------------------|
| 3.2.4 | AA01449 |
|---------------+-----------------------|
| 3.2.50 | AA01450 |
|---------------+-----------------------|
| 3.3 | Cisco IOS XR 3.3 is |
| | not vulnerable |
+---------------------------------------+
Workarounds
===========
There is no workaround to mitigate the effects of these
vulnerabilities.
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-20060419-xr.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 | 2006-April-19 | 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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3.
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Hash: SHA1
Cisco Security Response: Response to Privilege Escalation on Multiple
Cisco Products
http://www.cisco.com/warp/public/707/cisco-sr-20060419-priv.shtml
Revision 1.0
For Public Release 2006 April 19 1500 UTC (GMT)
- - ---------------------------------------------------------------------
Contents
========
Cisco Response
Additional Information
Revision History
Cisco Security Procedures
- - ---------------------------------------------------------------------
Cisco Response
==============
This is Cisco PSIRT's response to the privilege escalation
vulnerability independently announced by Adam Pointon of
Assurance.com.au and Mathieu Pepin of Axen Consulting. We would like
to thank both Adam and Mathieu for bringing this issue to our
attention.
The following are affected by this vulnerability:
* Cisco Wireless LAN Solution Engine (WLSE)
* Cisco Hosting Solution Engine (HSE)
* Cisco User Registration Tool (URT)
* Cisco Ethernet Subscriber Solution Engine (ESSE)
* CiscoWorks2000 Service Management Solution (SMS)
Additional Information
======================
By exploiting this vulnerability, an authenticated attacker on the
command line interface may obtain shell access to the underlying
operating system by injecting specially crafted commands.
The following products are affected by this vulnerability:
* Cisco WLSE - A separate Cisco Security Advisory has been
published which addresses multiple vulnerabilities in the WLSE
appliance, including this vulnerability. Refer to the security
advisory at the following URL for more information on the impact
and fixed software versions: http://www.cisco.com/warp/public/707
/cisco-sa-20060419-wlse.shtml.
* This vulnerability is addressed by the Cisco bug ID CSCsd22861 (
registered customers only) for the URT appliance. 2.5.5(A1)
version of the URT software fixes this issue and can be
downloaded from the following URL: http://www.cisco.com/cgi-bin/
tablebuild.pl/urt-3des.
* Cisco HSE - This vulnerability is addressed by the Cisco bug ID
CSCsd22859 ( registered customers only) for the HSE appliance.
The HSE-PSIRT1 patch fixes this issue and can be downloaded from
the following URL: http://www.cisco.com/cgi-bin/tablebuild.pl/
1105-host-sol.
* Cisco ESSE - This product has reached End-of-Life therefore Cisco
will not be providing fixed software for the ESSE product by
default. Customers who require a fix for this should open a
service request and request a fix through the Technical Support
organization.
* CiscoWorks SMS - This product has reached End-of-Life therefore
Cisco will not be providing fixed software for the SMS product by
default. Customers who require a fix for this should open a
service request and request a fix through the Technical Support
organization.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2006-Apr-19 | 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/warp/public/707/sec_incident_response.shtml.
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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