A vulnerability has been reported in GnuTLS, which can be exploited by malicious people to conduct spoofing attacks.
The vulnerability is caused due to an error when parsing X.509 CN and SAN fields containing NUL ('\0') characters. This can be exploited to e.g. stop GnuTLS from printing the entire CN and SAN fields and conduct Man-in-the-Middle (MitM) attacks on server-authenticated TLS sessions via specially crafted X.509 certificates.
The vulnerability is reported in versions prior to 2.8.2.
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: GnuTLS X.509 CN and SAN Fields NUL Character Spoofing Vulnerability
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.