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Nortel IP Softphone 2050 Buffer Overflow Vulnerability
Secunia Advisory: SA27252
Release Date: 2007-10-18
Last Update: 2008-03-06
Popularity: 4,150 views

Critical:
Moderately critical
Impact: DoS
System access
Where: From local network
Solution Status: Vendor Patch

Software:Nortel IP Softphone 2050

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CVE reference:CVE-2007-5636


Description:
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

Changelog:
2007-10-26: Added CVE reference.
2008-03-06: Updated "Solution" and "Original Advisory" sections.

Original Advisory:
Nortel:
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=696882

Compass Security Network Computing AG:
http://www.csnc.ch/static/advisory/cs...IP_softphone_buffer-overflow_v1.0.txt


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