A vulnerability has been reported in Nortel IP Softphone 2050, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a vulnerable system.
The vulnerability is caused due to boundary errors when processing invalid packets sent to the RTCP port. This can be exploited to cause a buffer overflow and crash the application via specially crafted packets.
Successful exploitation may allow execution of arbitrary code.
Solution: Update to release R2.2 Upgrade Version 264 (see vendor advisory for further details).
Provided and/or discovered by: Daniel Stirnimann and Cyrill Brunschwiler, Compass Security Network Computing AG
Original Advisory: Nortel:
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Subject: Nortel IP Softphone 2050 Buffer Overflow Vulnerability