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TITLE:
Asterisk IAX2 Channel Driver Information Disclosure

SECUNIA ADVISORY ID:
SA25134

VERIFY ADVISORY:
http://secunia.com/advisories/25134/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
>From local network

SOFTWARE:
Asterisk 1.x
http://secunia.com/product/2155/

DESCRIPTION:
A vulnerability has been reported in Asterisk, which can be exploited
by malicious users to disclose potential sensitive information.

The vulnerability is caused due to an error within the IAX2 channel
driver (chan_iax2) in the processing of text frames. This can be
exploited to disclose potentially sensitive heap memory by sending a
text frame with content that is not NULL terminated.

The vulnerability affects the following versions:
* Asterisk Open Source 1.2.x and 1.4.x (all releases prior 1.2.19 and
1.4.5)
* Asterisk Business Edition A.x.x (all releases)
* Asterisk Business Edition B.x.x (all releases prior to B.2.1)
* AsteriskNOW pre-release (all releases prior to and including Beta
5)
* Asterisk Appliance Developer Kit (all releases prior to 0.4.1)

SOLUTION:
Fixed in the Subversion repository.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Tim Panton and Birgit Arkesteijn.

ORIGINAL ADVISORY:
http://ftp.digium.com/pub/asa/ASA-2007-013.pdf

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