Some vulnerabilities have been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerabilities are caused due to NULL-pointer dereference errors in the "sip_uri_params_cmp()" and "sip_uri_headers_cmp()" functions. This can be exploited to crash the application via a SIP message lacking certain headers or parameters in the SIP URI.
Successful exploitation requires a valid user account on the Asterisk server or a Man-in-the-Middle attack. It also requires that the SIP channel driver is configured with the "pedantic" option enabled.
The vulnerabilities are reported in Asterisk Open Source versions 1.4.22, 1.4.23, 184.108.40.206, all 1.6.0.x versions prior to 220.127.116.11, all 1.6.1.x versions prior to 18.104.22.168-rc2, and Asterisk Business Edition version C.2.3.
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
information to firstname.lastname@example.org
Subject: Asterisk "pedantic" SIP Processing Denial of Service
No posts yet
You must be logged in to post a comment.
Secunia Customer Login
Not a customer already?
Learn more about how our market leading Vulnerability Management solutions can help you manage risk and ensure compliance.