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TITLE:
Cisco Unified Communications Manager Denial of Service
Vulnerabilities

SECUNIA ADVISORY ID:
SA36498

VERIFY ADVISORY:
http://secunia.com/advisories/36498/

DESCRIPTION:
Some vulnerabilities have been reported in Cisco Unified
Communications Manager, which can be exploited by malicious people to
cause a DoS (Denial of Service).

1) An error in the processing of SIP INVITE messages can be exploited
to terminate a critical process and disrupt the voice services.

2) An error in the handling of network connections can be exploited
to prevent new connections from being established to system services
by establishing a high amount of TCP connections with an affected
system.

3) Two errors in the processing of SIP and SCCP packets can be
exploited to close the SIP port (5060/TCP and 5061/TCP) and SCCP port
(2000/TCP and 2443/TCP) by flooding an affected system with TCP
packets.

SOLUTION:
Update to version 5.1(3g) (reportedly available in early September
2009).

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

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20090826-cucm.shtml

OTHER REFERENCES:
Cisco Applied Mitigation Bulletin:
http://www.cisco.com/en/US/products/products_applied_mitigation_bulletin09186a0080af2d2f.html

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