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.
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 8.0 | |
authoritative | lt | 3.4.11 | |
authoritative | ge | 4.0.0 | |
authoritative | lt | 4.0.2 | |
recursor | ge | 4.0.0 | |
recursor | lt | 4.0.4 | |
recursor | lt | 3.7.4 |