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Asterisk SIP Message Handling Denial of Service Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA24380  
Release Date: 2007-03-07
Last Update: 2007-03-19

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

Software:Asterisk 1.x

CVE reference:CVE-2007-1306 (Secunia mirror)

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Description:
MU Security Research Team has reported a vulnerability in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a NULL-pointer dereference error when handling SIP request messages. This can be exploited to crash the service via a specially crafted SIP message with no URI and SIP version sent to default port 5060/UDP.

The vulnerability is reported in version 1.4.0 and 1.2.15. Prior versions may also be affected.

Solution:
Update to version 1.4.1 or 1.2.16.

Provided and/or discovered by:
MU Security Research Team

Changelog:
2007-03-08: Updated description to include additional information from MU Security.
2007-03-19: Added CVE reference.

Original Advisory:
Asterisk:
http://asterisk.org/node/48320
http://asterisk.org/node/48319

MU Security:
http://labs.musecurity.com/advisories/MU-200703-01.txt

Other References:
US-CERT VU#228032:
http://www.kb.cert.org/vuls/id/228032



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

28 Related Secunia Security Advisories, displaying 10

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5. Asterisk "BYE/Also" Denial of Service Vulnerability
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10. Asterisk Voicemail IMAP Backend Invalid MIME Denial of Service

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