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TITLE:
Cisco Firewall Services Module Security Bypass and Denial of Service
Vulnerabilities

SECUNIA ADVISORY ID:
SA46278

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46278/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46278

RELEASE DATE:
2011-10-23

DISCUSS ADVISORY:
http://secunia.com/advisories/46278/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/46278/

ONLY AVAILABLE IN CUSTOMER AREA:
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 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=46278

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Multiple vulnerabilities have been reported in Cisco Firewall
Services Module (FWSM), which can be exploited by malicious people to
bypass certain security restrictions and cause a DoS (Denial of
Service).

1) An error in the implementation of the system log message ID 302015
when generating a log message for IPv6 traffic can be exploited to
cause a memory corruption.

Successful exploitation of this vulnerability requires that the FWSM
has interfaces with IPv6 addresses.

2) An error in the authentication proxy feature during a high number
of network access authentication requests related to the "aaa
authentication match" and "aaa authentication include" commands can
be exploited to cause a crash.

3) An error in the TACACS+ implementation can be exploited to bypass
the TACACS+ authentication mechanism.

4) Four errors in the SunRPC inspection engine while processing
certain SunRPC messages can be exploited to reload a device via
specially crafted SunRPC packets that transit the appliance.

5) An error in the ILS inspection engine while processing certain ILS
messages can be exploited to reload a device via specially crafted ILS
packets that transit the appliance.

The vulnerabilities are reported in versions 3.1, 3.2, 4.0, and 4.1.

SOLUTION:
Update to version 3.1(21), 3.2(22), 4.0(16), or 4.1(7).

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

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20111005-fwsm.shtml

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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private users keeping their systems up to date against the latest
vulnerabilities.

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