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.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
The product does not properly control the allocation and maintenance of a limited resource.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068 | third party advisory issue tracking |
| https://www.debian.org/security/2017/dsa-3764 | third party advisory vendor advisory |
| https://www.debian.org/security/2017/dsa-3763 | third party advisory vendor advisory |
| https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/ | vendor advisory |