ID: 3271
Date: 26 July 2007 09:54
Title: 3271 - Cisco Security Response: Vulnerability in Java Secure Socket Extension
Abstract: Some versions of Sun JSSE do not properly handle certain Transport Layer Security (TLS) or Secure Sockets Layer (SSL) handshake requests. A device running an affected JSSE version will experience excessive CPU usage, which may affect normal device operation and result in a denial of service (DoS) condition.
Vendors affected:CISCO
Applications affected:Java Secure Socket Extension (JSSE), Cisco Unified CallManager and Cisco Unified Presence
Warning Status: Imminent
Potential Damage: Host DoS
Availability of fix: Available
Type of fix: Patch
Source: Cisco
Reliability of source: Trusted
Source URL: http://www.cisco.com/warp/public/707/cisco-sr-20070725-jsse.shtml
.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 Cisco Security Response: Vulnerability in Java Secure Socket Extension
http://www.cisco.com/warp/public/707/cisco-sr-20070725-jsse.shtml Revision 1.0
For Public Release 2007 July 25 1600 UTC (GMT)
+--------------------------------------------------------------------
Cisco Response
==============
This is the Cisco PSIRT response to the vulnerability in Java Secure Socket Extension (JSSE) disclosed by Sun Microsystems on July 10, 2007, the details of which are available at http://sunsolve.sun.com/search/document.do?assetkey=1-26-102997-1.
There are no workarounds available for this vulnerability. Cisco recommends that customers update all vulnerable applications and components to provide the greatest protection from the listed vulnerability. Cisco will update this document in the event of any changes.
Additional Information
======================
Some versions of Sun JSSE do not properly handle certain Transport Layer Security (TLS) or Secure Sockets Layer (SSL) handshake requests.
A device running an affected JSSE version will experience excessive CPU usage, which may affect normal device operation and result in a denial of service (DoS) condition.
Sun has provided a comprehensive list of affected JSSE versions at the previously listed URL. Please refer to the Sun Alert Notification for details.
Products Affected by the JSSE Vulnerability
+------------------------------------------
Note: The following list is subject to change. Cisco is continuing to review the potential impact of this vulnerability on its products; this list may be updated to include additional Cisco products that are affected by this vulnerability.
The following products are affected by the Sun JSSE issue listed in this Security Response:
* Cisco Unified Call Manager - Cisco bug ID is CSCsh63934. Fixed
software is available as releases 5.1(2) and 6.0(1). Customers running
release 5.0 are advised to migrate to release 5.1(2) or later.
Releases before 5.0 are not affected.
* Cisco Unified Presence - Cisco bug ID is CSCsi77690. Fixed software
is available as release 6.0(1). Customers running earlier versions are
advised to migrate to release 6.0(1) or later.
Workarounds
+----------
There is no workaround for this issue, but mitigation is possible.
Cisco Unified CallManager and Cisco Unified Presence customers are advised to restrict access to the administrative interface to the IP addresses of known management stations. Information on how to implement such access restrictions is available at the following link:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a008085f858.html
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.
Revision History
================
+-----------------------------------------------------------+
| Revision 1.0 | 2007-July-25 | Initial 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 (C) 2006-2007 Cisco Systems, Inc. All rights reserved.
+--------------------------------------------------------------------
Updated: Jul 25, 2007 Document ID: 97830
+--------------------------------------------------------------------
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
iD8DBQFGp29J8NUAbBmDaxQRAquxAJ9DAvYwVb4G11mf5+xVsQ1ZcG55hQCfUwhX
Ote8IEVStps8zvcXmh/qZZU=
=WCDS
-----END PGP SIGNATURE-----
This advisory contains information released by the original author. Some of the information may have changed since it was released. If the issue affects you, it may be prudent to retrieve the advisory from the site of the original source to ensure that you receive the most current information concerning that problem. Reference to any specific commercial product, process, or service by trade name, trademark manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favouring by CPNI.
The views and opinions of authors expressed within this notice shall not be used for advertising or product endorsement purposes. CPNI shall not accept responsibility for any errors or omissions contained within this advisory. In particular, they shall not be liable for any loss or damage whatsoever, arising from or in connection with the usage of information contained within this advisory.
CSIRTUK is a member of the Forum of Incident Response and Security Teams (FIRST) and has contacts with other international Incident Response Teams (IRTs) in order to foster cooperation and coordination in incident prevention, to prompt rapid reaction to incidents, and to promote information sharing amongst its members and the community at large.