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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0541 -- Cisco Security Advisory Cisco Security Agent Vulnerable to Crafted IP Attack 14 July 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Security Agent (CSA) Publisher: Cisco Systems Operating System: Windows (all versions except XP) Impact: Denial of Service Access: Remote/Unauthenticated Original Bulletin: http://www.cisco.com/warp/public/707/cisco-sa-20050713-csa.shtml - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================== Cisco Security Advisory: Cisco Security Agent Vulnerable to Crafted IP Attack Revision 1.0 For Public Release 2005 July 13 1600 UTC (GMT) ============================================================================== Contents Summary Affected Products Details Impact Software Versions and Fixes Obtaining Fixed Software Workarounds Exploitation and Public Announcements Status of This Notice: FINAL Distribution Revision History Cisco Security Procedures ============================================================================== Summary ======= Cisco Security Agent (CSA) is a network security software agent that provides threat protection for server and desktop computing systems. A malicious attacker may be able to send a crafted IP packet to a Windows workstation or server running CSA 4.5 which may cause the device to halt and/or reload. Repeated exploitation will create a sustained DoS (denial of service). Cisco has made free software available to address this vulnerability. This vulnerability is documented in the Cisco Bug Toolkit as Bug ID CSCsa85175 This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20050713-csa.shtml Affected Products ================= Vulnerable Products +------------------ Cisco CSA version 4.5 when running on any Microsoft Windows platforms except Windows XP. Products Confirmed Not Vulnerable +-------------------------------- The following products are confirmed not vulnerable: * Cisco CSA 4.0 and earlier * Cisco CSA while running on Solaris * Cisco CSA while running on Linux * Cisco CSA while running on Windows XP No other Cisco products are currently known to be affected by vulnerability. Details ======= If a crafted IP packet with certain characteristics are sent to a Windows platform running CSA 4.5, Windows will halt with a blue screen and system crash. When exploited, the affected machine will require a reboot to become operational again. This vulnerability is documented in the Cisco Bug Toolkit as Bug ID CSCsa85175 Impact ====== Successful exploitation of this vulnerability will cause a reload of the affected machine. Software Versions and Fixes =========================== This issue is fixed in CSA maintenance version 4.5.1.616 which is available for download at http://www.cisco.com/cgi-bin/tablebuild.pl/csa. This issue is also fixed with CSA hotfix version 4.5.0.573 or later which is available for download at http://www.cisco.com/cgi-bin/tablebuild.pl/csahf-crypto A maintenance release is a scheduled revision of Cisco CSA that introduces new features or bug fixes, or both. A hotfix is Cisco CSA update that delivers fixes on an accelerated schedule that introduce new bug fixes. Obtaining Fixed Software ======================== 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 assistance with the upgrade, which should be free of charge. 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 Please 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. Please do not contact either "psirt@cisco.com" or "security-alert@cisco.com" for software upgrades. See 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. 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. Workarounds =========== There are no recommended workarounds for this vulnerability. Please see the Obtaining Fixed Software section for appropriate solutions to resolve this vulnerability. Exploitation and Public Announcements ===================================== The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory. Cisco would like to thank Ben Collins at InfoSec Research Labs for bringing this to our attention. Status of This Notice: FINAL ============================ THIS ADVISORY IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE ADVISORY OR MATERIALS LINKED FROM THE ADVISORY IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS NOTICE AT ANY TIME. A stand-alone copy or paraphrase of the text of this security advisory 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 will be posted on Cisco's worldwide website at http://www.cisco.com/warp/public/707/cisco-sa-20050713-csa.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 (includes CERT/CC) * bugtraq@securityfocus.com * 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 | 2005-July-13 | Initial public | | 1.0 | | 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 © 1992-2005 Cisco Systems, Inc. All rights reserved. Important Notices <http://www.cisco.com/public/copyright.html> and Privacy Statement <http://www.cisco.com/public/privacy.html>. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (SunOS) iD8DBQFC1SsQezGozzK2tZARAvC8AKD4puXn23xrJg0GOP3ch+NbqJxcrQCZAfVw 4/7sRBXzXl4lzy8tOoSOgQg= =74jL - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBQtXIJyh9+71yA2DNAQKGTAP9HQ1bXo/cb8qqrO08DQfatz5fNBvMqaVy RfyyTTVFh5cAHSXzxkOHlQtHb8JtLqg5vwXMEFtgfESuU9Ja1evgg8jtiOIy1CBt XlvpmxZ/jX1zIviwKUu7a4UaLHUPi1tRd2f7bVPFNBKJHKs1j/Sokt+K2SixfquE yijFkRleR7Y= =y8gP -----END PGP SIGNATURE-----