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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub 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)jessie3.4.1-4+deb8u8fixed
jessie (security)3.4.1-4+deb8u7fixed
stretch4.0.3-1+deb9u2fixed
buster, sid4.1.4-1fixed
pdns-recursor (PTS)jessie3.6.2-2+deb8u4fixed
jessie (security)3.6.2-2+deb8u3fixed
stretch (security), stretch4.0.4-1+deb9u3fixed
buster, sid4.1.4-3fixed

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

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

Notes

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

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