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TITLE:
Asterisk SIP Channel Driver Dialog History Memory Exhaustion

SECUNIA ADVISORY ID:
SA26553

VERIFY ADVISORY:
http://secunia.com/advisories/26553/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Asterisk Appliance Developer Kit 0.x
http://secunia.com/product/14821/
Asterisk 1.x
http://secunia.com/product/2155/

DESCRIPTION:
A vulnerability has been reported in Asterisk, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to the SIP Dialog History of SIP
channel driver (chan_sip) recording all history items (88 bytes per
item) in memory. This can be exploited to cause a DoS due to memory
exhaustion by causing a high amount of logged items.

The vulnerability is reported in Asterisk 1.4.x prior to version
1.4.11. Asterisk Appliance Developer Kit 0.x.x prior to version 0.8.0
and s800i (Asterisk Appliance) 1.0.x prior to version 1.0.3 are also
affected.

SOLUTION:
Asterisk 1.4.x:
Update to version 1.4.11.
http://downloads.digium.com/pub/telephony/asterisk

Asterisk Appliance Developer Kit 0.x.x:
Update to version 0.8.0.
http://downloads.digium.com/pub/telephony/aadk

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Jon Moldenauer.

ORIGINAL ADVISORY:
http://downloads.digium.com/pub/asa/AST-2007-020.pdf

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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