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TITLE:
Asterisk AEL Extensions Security Bypass

SECUNIA ADVISORY ID:
SA24694

VERIFY ADVISORY:
http://secunia.com/advisories/24694/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

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

DESCRIPTION:
A security issue has been reported in Asterisk, which can be
exploited by malicious people to bypass certain security
restrictions.

The security issue is caused due to a problem within the AEL
(Asterisk Extension Language) when generating switch extensions.
Depending on the extension, an attacker may be able to guess and dial
a special number, which could allow him to e.g. listen to the
voicemails of other users.

SOLUTION:
Fixed in the SVN repository.

PROVIDED AND/OR DISCOVERED BY:
Philipp Kempgen

ORIGINAL ADVISORY:
http://bugs.digium.com/view.php?id=9316

http://lists.digium.com/pipermail/asterisk-dev/2007-March/026647.html

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