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TITLE:
AOL AIM SIPFoundry sipXtapi Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA37143

VERIFY ADVISORY:
http://secunia.com/advisories/37143/

DESCRIPTION:
Two vulnerabilities have been reported in AOL AIM, which can be
exploited by malicious people to compromise a user's system.

1) A signedness error in the SIP protocol implementation library
(sipXtapi.dll) when parsing RTCP sender report packets can be
exploited to cause a heap-based buffer overflow.

Successful exploitation may allow execution of arbitrary code, but
requires that a user is tricked into accepting a Video Messaging
session.

2) An error in sipXtapi.dll when parsing RTP information can be
exploited to cause a heap-based buffer overflow via a specially
crafted "Extension Length" RTP header value.

Successful exploitation may allow execution of arbitrary code, but
requires that a user has an active voice session.

SOLUTION:
Update to version 6.8.7.7 or later.

PROVIDED AND/OR DISCOVERED BY:
Reported by wushi of team509 via ZDI.

ORIGINAL ADVISORY:
ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-08-097/
http://www.zerodayinitiative.com/advisories/ZDI-08-098/

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