SynopsisThe remote name server is affected by an assertion failure vulnerability.
DescriptionAccording to its self-reported version, the instance of ISC BIND 9 running on the remote name server is 9.12.0 or 9.12.1. It is, therefore, affected by an assertion failure vulnerability which exists in the rbtdb.c due to the implementation of the new serve-stale feature and NSEC aggressive negative caching.
An unauthenticated, remote attacker can exploit this to cause undesirable behavior such as recurision looping or excessive logging, resulting in a degradation or denial of service.
SolutionUpgrade to ISC BIND version 9.12.1-P2 or later.