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 a NULL-pointer dereference error in the "ast_uri_decode()" function. This can be exploited to crash the application via a SIP message lacking a "From" field.
Successful exploitation requires that "pedantic" processing is enabled.
The vulnerability is reported in the following products:
* Asterisk Open Source 1.0.x (all versions)
* Asterisk Open Source 1.2.x (all versions prior to 1.2.29)
* Asterisk Business Edition A.x.x (all versions)
* Asterisk Business Edition B.x.x (all versions prior to B.2.5.3)
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
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Subject: Asterisk "pedantic" SIP Processing Denial of Service
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