|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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub 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.
|pdns (PTS)||stretch (security), stretch||4.0.3-1+deb9u5||fixed|
|pdns-recursor (PTS)||buster, buster (security)||4.1.11-1+deb10u1||fixed|
The information below is based on the following data on fixed versions.