PowerDNS Recursor Null Pointer Dereference Vulnerability in Zone Caching Function

A null pointer dereference vulnerability has been identified in PowerDNS Recursor. This issue arises in the zoneToCache function when it processes data from a malicious authoritative server. The vulnerability is caused by a lack of proper consistency checks, allowing an attacker to send a crafted zone that leads to the null pointer dereference, ultimately causing a denial-of-service condition.

Impact

Exploitation of this vulnerability leads to a null pointer dereference, causing a denial-of-service condition by crashing the PowerDNS Recursor process.