Technical Description

Multiple vulnerabilities have been identified in Cisco PIX 500 Series Security Appliance (PIX) and Cisco 5500 Series Adaptive Security Appliance (ASA), which could be exploited by attackers to cause a denial of service.

The first issue is caused by an error in the Media Gateway Control Protocol (MGCP) application layer protocol inspection feature (disabled by default) when processing malformed packets sent to port 2427/UDP, which could be exploited by attackers to reload a vulnerable application, creating a denial of service condition.

The second vulnerability is caused by an error in the handling of specially crafted Transport Layer Security (TLS) packets, which could be exploited by attackers to reload a vulnerable application, creating a denial of service condition.

Affected Products

Cisco PIX versions 7.x
Cisco PIX versions 8.x
Cisco Adaptive Security Appliance (ASA) versions 7.x
Cisco Adaptive Security Appliance (ASA) versions 8.x

Solution

Upgrade to version 7.0(7), 7.1(3), 7.2(3), or 8.0(2) :
http://www.cisco.com/pcgi-bin/tablebuild.pl/pix?psrtdcat20e2
http://www.cisco.com/pcgi-bin/tablebuild.pl/asa?psrtdcat20e2

References

http://www.vupen.com/english/advisories/2007/3531
http://www.cisco.com/warp/public/707/cisco-sa-20071017-asa.shtml

Credits

Vulnerabilities reported by the vendor.

ChangeLog

2007-10-18 : Initial release

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