The OpenNET Project
 
Search (keywords):  SOFT ARTICLES TIPS & TRICKS SECURITY
LINKS NEWS MAN DOCUMENTATION


Cisco Security Advisory: Cisco PIX Multiple Vulnerabilities


<< Previous INDEX Search src Set bookmark Go to bookmark Next >>
Date: Wed, 20 Nov 2002 08:00:00 -0800 (UTC)
From: Cisco Systems Product Security Incident Response Team <psirt@cisco.com.>
To: [email protected]
Subject: Cisco Security Advisory: Cisco PIX Multiple Vulnerabilities

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

          Cisco Security Advisory: Cisco PIX Multiple Vulnerabilities


Revision 1.0

  For Public Release 2002 November 20 at 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
   Distribution
   Revision History
   Cisco Security Procedures

     ----------------------------------------------------------------------

Summary

   The Cisco PIX Firewall provides robust, enterprise-class security services
   including stateful inspection firewalling, standards-based IP Security
   (IPsec) Virtual Private Networking (VPN), intrusion protection and much
   more in cost-effective, easy to deploy solutions.

   Two vulnerabilities have been resolved for the PIX firewall for which
   fixes are available. These vulnerabilities are documented as Cisco bug ID
   CSCdv83490 and CSCdx35823. There are no workarounds available to mitigate
   the effects of these vulnerabilities.

   This advisory will be posted at
   http://www.cisco.com/warp/public/707/pix-multiple-vuln-pub.shtml.

Affected Products

   All PIX Firewall units running the vulnerable releases and using the
   specific features are affected by these vulnerabilities.

   No other Cisco products are currently known to be affected by these
   vulnerabilities.

   +-------------------------------------------------+
   |       DDTs-Description        |Affected Release |
   |-------------------------------+-----------------|
   |CSCdv83490-While processing    |6.0.3 and earlier|
   |initial contact notify messages|6.1.3 and earlier|
   |the PIX does not delete        |                 |
   |duplicate Internet Security    |                 |
   |Authentication Key Management  |                 |
   |Protocol Security Associations |                 |
   |(ISAKMP SAs) with the peer.    |                 |
   |-------------------------------+-----------------|
   |CSCdx35823-Buffer overflow     |5.2.8 and earlier|
   |while doing HTTP traffic       |6.0.3 and earlier|
   |authentication using Terminal  |6.1.3 and earlier|
   |Access Controller Access       |6.2.1 and earlier|
   |Control System Plus (TACACS+)  |                 |
   |or Remote Authentication       |                 |
   |Dial-In User Service (RADIUS). |                 |
   +-------------------------------------------------+

   To determine your software revision, type show version at the command line
   prompt.

Details

   CSCdv83490
           When a user establishes a VPN session upon successful peer and
           user authentication, the PIX creates an ISAKMP SA associating the
           user and his IP address.

           If an attacker is now able to block the logged-in user's
           connection and establish a connection to the PIX using the same IP
           address as that of the user, he will be able to establish a VPN
           session with the PIX, using only peer authentication, provided he
           already has access to the peer authentication key also known as
           the group pre-shared key (PSK) or group password key.

   CSCdx35823
           A user starting a connection via FTP, Telnet, or over the World
           Wide Web (HTTP) is prompted for their user name and password. If
           the user name and password are verified by the designated TACACS+
           or RADIUS authentication server, the PIX Firewall unit will allow
           further traffic between the authentication server and the
           connection to interact independently through the PIX Firewall
           unit's "cut-through proxy" feature.

           The PIX may crash and reload due to a buffer overflow
           vulnerability while processing HTTP traffic requests for
           authentication using TACACS+ or RADIUS.

   The Internetworking Terms and Acronyms online guide can be found at
   http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/index.htm. The Cisco
   Systems Terms and Acronyms online guide can be found at
   http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/cisco12.htm.

   These vulnerabilities are documented in the Bug Toolkit as Bug IDs
   CSCdv83490 and CSCdx35823, and can be viewed after 2002 November 21 at
   1600 UTC. To access this tool, you must be a registered user and you must
   be logged in.

Impact

   +-------------------------------------------------+
   |    DDTs-Description     |        Impact         |
   |-------------------------+-----------------------|
   |CSCdv83490-While         |This vulnerability can |
   |processing initial       |be exploited to        |
   |contact notify messages  |initiate a             |
   |the PIX does not delete  |Man-In-The-Middle      |
   |duplicate ISAKMP SA's    |attack for VPN sessions|
   |with the peer.           |to the PIX.            |
   |-------------------------+-----------------------|
   |CSCdx35823 - Buffer      |This vulnerability can |
   |overflow while doing HTTP|be exploited to        |
   |traffic authentication   |initiate a             |
   |using TACACS+ or RADIUS. |Denial-of-Service      |
   |                         |attack.                |
   +-------------------------------------------------+

Software Versions and Fixes

   +-------------------------------------------------+
   |         DDTs-Description         |Fixed Releases|
   |----------------------------------+--------------|
   |CSCdv83490-While processing       |6.0.4 and     |
   |initial contact notify messages   |later         |
   |the PIX does not delete duplicate |6.1.4 and     |
   |ISAKMP SAs with the peer.         |later         |
   |                                  |6.2.1 and     |
   |                                  |later         |
   |----------------------------------+--------------|
   |CSCdx35823-Buffer overflow while  |5.2.9 and     |
   |doing HTTP traffic authentication |later         |
   |using TACACS+ or RADIUS.          |6.0.4 and     |
   |                                  |later         |
   |                                  |6.1.4 and     |
   |                                  |later         |
   |                                  |6.2.2 and     |
   |                                  |later         |
   +-------------------------------------------------+

   The procedure to upgrade to the fixed software version is detailed at
   http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/index.htm.

Obtaining Fixed Software

   Cisco is offering free software upgrades to address these vulnerabilities
   for all affected customers. Customers may only install and expect support
   for the feature sets they have purchased.

   Customers with service contracts should contact their regular update
   channels to obtain the free software upgrade identified via this advisory.
   For most customers with service contracts, this means that upgrades should
   be obtained through the Software Center on Cisco's worldwide website at
   http://www.cisco.com/pcgi-bin/tablebuild.pl/pix. To access the software,
   download URL http://www.cisco.com/pcgi-bin/tablebuild.pl/pix, you must be
   a registered user and you must be logged in.

   Customers whose Cisco products are provided or maintained through a 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 obtaining the free software
   upgrade(s).

   Customers who purchased directly 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 obtain fixed software by contacting the Cisco Technical
   Assistance Center (TAC) using the contact information listed below. In
   these cases, customers are entitled to obtain an upgrade to a later
   version of the same release or as indicated by the applicable corrected
   software version in the Software Versions and Fixes section (noted above).

   Cisco 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: [email protected]


   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.

   Please have your product serial number available and give the URL of this
   advisory as evidence of your entitlement to a free upgrade.

   Please do not contact either "[email protected]" or
   "[email protected]" for software upgrades.

Workarounds

   There are no workarounds for these vulnerabilities. The Cisco PSIRT
   recommends that affected users upgrade to a fixed software version of
   code.

Exploitation and Public Announcements

   The Cisco PSIRT is not aware of any malicious use of the vulnerabilities
   described in this advisory.

   These vulnerabilities were reported to PSIRT by Cisco engineering and
   customers.

Status of This Advisory: FINAL

   This is a final advisory. Although Cisco cannot guarantee the accuracy of
   all statements in this advisory, all of the facts have been checked to the
   best of our ability. Cisco does not anticipate issuing updated versions of
   this advisory unless there is some material change in the facts. Should
   there be a significant change in the facts, Cisco may update this
   advisory.

   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/pix-multiple-vuln-pub.shtml.

   In addition to worldwide website posting, a text version of this advisory
   is clear-signed with the Cisco PSIRT PGP key having the fingerprint FEB1
   1B89 A64B 60BB 4770 D1CE 93D2 FF06 F236 759C and is posted to the
   following e-mail and Usenet news recipients:

     * [email protected]
     * [email protected]
     * [email protected]
     * [email protected] (includes CERT/CC)
     * [email protected]
     * [email protected]
     * comp.dcom.sys.cisco
     * Various internal Cisco mailing lists


   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 | 2002-Nov-20 | Initial public release |
   | 1.0      |             |                        |
   +-------------------------------------------------+

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
   advisories. All Cisco security advisories are available at
   http://www.cisco.com/go/psirt.

     ----------------------------------------------------------------------

   This advisory is Copyright 2002 by Cisco Systems, Inc. This advisory may
   be redistributed freely after the release date given at the top of the
   text, provided that redistributed copies are complete and unmodified,
   including all date and version information.

     ----------------------------------------------------------------------

-----BEGIN PGP SIGNATURE-----
Version: PGP 6.5.8
Comment: Signed by Sharad Ahlawat, Cisco Systems PSIRT

iQA/AwUBPdu0v5PS/wbyNnWcEQLXgwCeLnUwjHIRt78mpF3gqKUtinwbA9EAoPh+
2C0z9K2nj/WryNa1PorfZGJf
=dluo
-----END PGP SIGNATURE-----
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: PGP 6.5.8
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=UuaC
-----END PGP PUBLIC KEY BLOCK-----


<< Previous INDEX Search src Set bookmark Go to bookmark Next >>



Партнёры:
PostgresPro
Inferno Solutions
Hosting by Hoster.ru
Хостинг:

Закладки на сайте
Проследить за страницей
Created 1996-2024 by Maxim Chirkov
Добавить, Поддержать, Вебмастеру