CVE-2016-7068

NameCVE-2016-7068
DescriptionAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the PowerDNS server by sending crafted DNS queries, which might result in a partial denial of service if the system becomes overloaded. This issue is based on the fact that the PowerDNS server parses all records present in a query regardless of whether they are needed or even legitimate. A specially crafted query containing a large number of records can be used to take advantage of that behaviour.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-788-1, DLA-798-1, DSA-3763-1, DSA-3764-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pdns (PTS)buster4.1.6-3+deb10u1fixed
bullseye4.4.1-1fixed
bookworm4.7.3-2fixed
sid, trixie4.8.3-4fixed
pdns-recursor (PTS)buster, buster (security)4.1.11-1+deb10u1fixed
bullseye4.4.2-3fixed
bookworm4.8.4-1fixed
bookworm (security)4.8.7-1fixed
sid, trixie4.9.3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pdnssourcewheezy3.1-4.1+deb7u3DLA-798-1
pdnssourcejessie3.4.1-4+deb8u7DSA-3764-1
pdnssource(unstable)4.0.2-1
pdns-recursorsourcewheezy3.3-3+deb7u2DLA-788-1
pdns-recursorsourcejessie3.6.2-2+deb8u3DSA-3763-1
pdns-recursorsource(unstable)4.0.4-1

Notes

https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/

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