CVE-2016-7068

Name	CVE-2016-7068
Description	An 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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-788-1, DLA-798-1, DSA-3763-1, DSA-3764-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pdns (PTS)	jessie, jessie (lts)	3.4.1-4+deb8u10	fixed
	stretch (security), stretch (lts), stretch	4.0.3-1+deb9u5	fixed
	buster	4.1.6-3+deb10u1	fixed
	bullseye	4.4.1-1	fixed
	bookworm	4.7.3-2	fixed
	sid, trixie	4.9.2-1	fixed
pdns-recursor (PTS)	jessie, jessie (lts)	3.6.2-2+deb8u4	fixed
	buster (security), buster, buster (lts)	4.1.11-1+deb10u2	fixed
	bullseye	4.4.2-3	fixed
	bookworm (security), bookworm	4.8.8-1	fixed
	sid, trixie	5.0.9-1	fixed

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

Package	Type	Release	Fixed Version	Origin
pdns	source	wheezy	3.1-4.1+deb7u3	DLA-798-1
pdns	source	jessie	3.4.1-4+deb8u7	DSA-3764-1
pdns	source	(unstable)	4.0.2-1
pdns-recursor	source	wheezy	3.3-3+deb7u2	DLA-788-1
pdns-recursor	source	jessie	3.6.2-2+deb8u3	DSA-3763-1
pdns-recursor	source	(unstable)	4.0.4-1

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