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>> Cisco IP Phone 7940 SIP Message Processing Remote Denial of Service Issues

Title : Cisco IP Phone 7940 SIP Message Processing Remote Denial of Service Issues
VUPEN ID : VUPEN/ADV-2007-2928
CVE ID : CVE-2007-4459
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-08-21


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

Multiple vulnerabilities have been identified in Cisco IP Phone 7940, which could be exploited by remote attackers to cause a denial of service. These issues are caused by errors when processing specially crafted SIP message sequences, which could be exploited by attackers to cause a vulnerable device to reboot, creating a denial of service condition.

Affected Products

Cisco IP Phone 7940 versions prior to 8.7(0)
Cisco IP Phone 7960 versions prior to 8.7(0)

Solution

Upgrade to version 8.7(0) :
http://www.cisco.com/pcgi-bin/tablebuild.pl/sip-ip-phone7960?psrtdcat20e2

References

http://www.vupen.com/english/advisories/2007/2928
http://www.cisco.com/warp/public/707/cisco-sr-20070821-sip.shtml

Credits

Vulnerabilities reported by Humberto J. Abdelnur, Radu State and Olivier Festor (Madynes research team / INRIA Lorraine).

ChangeLog

2007-08-21 : Initial release
2007-08-21 : Updated Solution

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