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asterisk: denial of service

Package(s):asterisk CVE #(s):CVE-2012-3553
Created:June 26, 2012 Updated:June 27, 2012
Description: From the Red Hat bugzilla:

AST-2012-008 previously dealt with a denial of service attack exploitable in the Skinny channel driver that occurred when certain messages are sent after a previously registered station sends an Off Hook message. Unresolved in that patch is an issue in the Asterisk 10 releases, wherein, if a Station Key Pad Button Message is processed after an Off Hook message, the channel driver will inappropriately dereference a Null pointer.

Similar to AST-2012-008, a remote attacker with a valid SCCP ID can can use this vulnerability by closing a connection to the Asterisk server when a station is in the "Off Hook" call state and crash the server.

This only affects version 10, and is fixed in 10.5.1.

Alerts:
Fedora FEDORA-2012-9537 2012-06-26

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