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>> Asterisk Packets Handling Remote Buffer Overflow and Denial of Service Vulnerabilities
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Title : Asterisk Packets Handling Remote Buffer Overflow and Denial of Service Vulnerabilities
Advisory ID : VUPEN/ADV-2007-1534
CVE ID : CVE-2007-2293 - CVE-2007-2294
Rated as : High Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-04-25
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Multiple vulnerabilities have been identified in Asterisk, which could be exploited by remote attackers to cause a denial of service or take complete control of an affected system.
The first issue is caused by buffer overflow errors in the "process_sdp" [chan_sip.c] function that does not validate the "T38FaxRateManagement" and "T38FaxUdpEC" SDP parameters before being copied into insufficiently sized buffers, which could be exploited by remote unauthenticated attackers to execute arbitrary code by sending a specially crafted packet to an application with T.38 support enabled (disabled by default) [...]
References
http://www.vupen.com/english/advisories/2007/1534
http://ftp.digium.com/pub/asa/ASA-2007-012.pdf
http://ftp.digium.com/pub/asa/ASA-2007-010.pdf
Credits
Vulnerabilities reported by Barrie Dempster (NGS Software) and the vendor.
ChangeLog
2007-04-25 : Initial release
Vulnerability Management
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