From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Apr 09 2004 - 04:48:31 CDT

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TITLE:
Cisco IPSec VPN Services Module Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA11324

VERIFY ADVISORY:
http://secunia.com/advisories/11324/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
Cisco IPSec VPN Services Module

DESCRIPTION:
Cisco has confirmed a vulnerability in VPNSM, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The problem is that Cisco Catalyst 6500 Series Switch and Cisco 7600
Series Internet Router with the IPSec VPN Services Module (VPNSM) may
crash and reload when receiving a malformed IKE packet.

Systems with VPNSM and the following Cisco IOS versions are
affected:
* 12.2SXA
* 12.2SXB
* 12.2SY

SOLUTION:
Updates are available.
http://www.cisco.com/tacpage/library/12.2/index.shtml

For Cisco IOS 12.2SXA update to:
12.2(17b)SXA

For Cisco IOS 12.2SXB update to:
12.2(17d)SXB

For Cisco IOS 12.2SY update to:
12.2(14)SY03

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
Cisco IPSec VPN Services Module Malformed IKE Packet Vulnerability:
http://www.cisco.com/warp/public/707/cisco-sa-20040408-vpnsm.shtml

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