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TITLE:
Cisco PIX SIP Inspection Denial of Service

SECUNIA ADVISORY ID:
SA24179

VERIFY ADVISORY:
http://secunia.com/advisories/24179/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

OPERATING SYSTEM:
Cisco PIX 6.x
http://secunia.com/product/56/

DESCRIPTION:
Some vulnerabilities have been reported in Cisco PIX, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
bypass certain security restrictions.

1) An unspecified vulnerability within the SIP packet inspection can
be exploited to crash a device by sending specially crafted SIP
packets.

2) An unspecified vulnerability when manipulating ACLs (Access
Control Lists) that makes use of object groups can be exploited to
corrupt ACLs, resulting in ACE (Access Control Entries) being skipped
or not evaluated in order.

Successful exploitation requires that "SIP fixup" is enabled, which
is the default setting.

SOLUTION:
Update to version 6.3(5.115).

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20070214-pix.shtml

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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