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Moderately critical

Asterisk SIP INVITE Denial of Service Vulnerability

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Release Date:  2007-03-21    Last Update:  2007-03-26    Views:  12,675

Secunia Advisory SA24564

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

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 an error within the handling of certain SIP INVITE messages. This can be exploited to crash the server by sending a SIP INVITE message with 2 SDP headers, where the second header contains an invalid IP address.

Successful exploitation requires that the callee is an invalid dailplan or user.

The vulnerability is reported in versions 1.2.14, 1.2.15, 1.2.16, and 1.4.1. Prior versions may also be affected.


Solution:
Update to versions 1.4.2 or 1.2.17.

Provided and/or discovered by:
Humberto J. Abdelnur, Radu State, and Olivier Festor

Original Advisory:
Asterisk:
http://www.sineapps.com/news.php?rssid=1707

Full-Disclosure:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/053052.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Asterisk SIP INVITE Denial of Service Vulnerability

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