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TITLE:
Cisco Firewall Services Module Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA24172

VERIFY ADVISORY:
http://secunia.com/advisories/24172/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, DoS

WHERE:
>From remote

SOFTWARE:
Cisco Firewall Services Module (FWSM) 3.x
http://secunia.com/product/8614/

DESCRIPTION:
Some vulnerabilities and a security issue have been reported in Cisco
Firewall Services, which can be exploited by malicious people to cause
a DoS or bypass certain security restrictions.

1) An unspecified error within the enhanced inspection of HTTP
traffic can be exploited to cause the device to reload via specially
crafted HTTP traffic.

Successful exploitation requires that enhanced inspection is
enabled.

2) An error within the inspection of SIP packets can be exploited to
cause the device to reload via specially crafted SIP packets.

Successful exploitation requires that SIP inspection is enabled.

3) An unspecified error when processing malformed HTTPS requests can
be exploited to cause the device to reload by sending specially
crafted HTTPS requests.

Successful exploitation requires that "authentication for network
access" (auth-proxy) is enabled.

4) An error when processing HTTP requests with a very long URL can be
exploited to cause the device to reload, but requires that
"authentication for network access" (auth-proxy) is enabled.

5) An unspecified error exists when processing HTTPS traffic that is
directed to the FWSM. This can be exploited to cause the device to
reload by sending specially crafted HTTPS requests, but requires that
the HTTPS server is enabled.

6) An unspecified error when processing malformed SNMP requests from
a trusted device can be exploited to cause the affected device to
reload.

Successful exploitation requires that the other, trusted device has
explicit SNMP poll access.

7) A security issue when manipulating ACLs (Access Control Lists)
that make use of object groups can corrupt ACLs, resulting in ACEs
(Access Control Entries) being skipped or not evaluated in order,
which can be exploited to bypass certain security restrictions.

Note: Only an administrative user can change ACLs. Additionally, this
does not affected devices which are reloaded after ACLs have been
manipulated.

A vulnerability that could cause the device to reload when
"debugging" is enabled has also been reported.

SOLUTION:
Apply updated software. Please see vendor advisory for a patch
matrix.

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

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

Subscribe:
http://secunia.com/secunia_security_advisories/

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.
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use those supplied by the vendor.

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