Multiple vulnerabilities have been identified in various Asterisk products, 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 a buffer overflow error in the "iax_frame_wrap()" function within the IAX2 channel driver (chan_iax2) when processing a voice or video frame with a data payload larger than 4 kB, which could be exploited by remote attackers to execute arbitrary code by sending a specially crafted RTP frame to an affected application.
The second vulnerability is caused by a NULL pointer dereference error in the IAX2 channel driver (chan_iax2) when processing specially crafted "LAGRQ" or "LAGRP" frames, which could be exploited by attackers to crash an affected application.
The third issue is caused by an error in the Skinny channel driver (chan_skinny) when processing specially crafted packets, which could be exploited by attackers to crash an affected application.
The fourth vulnerability is caused by an error in the STUN implementation when processing malformed packets, which could be exploited by attackers to crash an affected application.
Credits
Vulnerabilities reported by Russell Bryant, Chris Clark and Zane Lackey (iSEC Partners) and Will Drewry (Google Security Team).
ChangeLog
2007-07-18 : Initial release
Vulnerability Management
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