DescriptionMaraDNS before and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
maradns (PTS)buster2.0.13-1.2fixed
buster (security)2.0.13-1.2+deb10u1fixed
bullseye (security), bullseye2.0.13-1.4+deb11u1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[squeeze] - maradns <no-dsa> (Minor issue)
[lenny] - maradns <no-dsa> (Minor issue)
a DoS that requires being able to do recursive queries. Allowing recursive queries to the general public is already a security issue to begin with, so this issue can better be addressed in a point update.

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