A vulnerability has been reported in MaraDNS, 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 DNS packets. This can be exploited to cause a resource rotation by sending specially crafted DNS packets, which cause an authoritative CNAME record to not resolve, resulting in a DoS.
The vulnerability is reported in version 1.0.x prior to 1.0.41, 1.2.x prior to 1.2.12.08, and 1.3.x prior to 1.3.07.04.
Solution: Update to version 1.0.41, 1.2.12.08, or 1.3.07.04.
Provided and/or discovered by: The vendor credits Michael Krieger.
Original Advisory: http://maradns.blogspot.com/2007/08/maradns-update-all-versions.html
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Subject: MaraDNS CNAME Record Resource Rotation Denial of Service
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