ISC BIND 9 Large RRSIG RRsets Negative Caching Remote DoS
High Nessus Plugin ID 54923
Synopsis
The remote name server may be affected by a denial of service vulnerability.
Description
According to its self-reported version number, the remote installation of BIND is potentially affected by a denial of service vulnerability. If BIND queries a domain with large RRSIG resource record sets it may trigger an assertion failure and cause the name server process to crash due to an off-by-one error in a buffer size check.
Note that Nessus has only relied on the version itself and has not attempted to determine whether or not the install is actually vulnerable.
Solution
Upgrade to BIND 9.4-ESV-R4-P1 / 9.6-ESV-R4-P1 / 9.7.3-P1 / 9.8.0-P2 or later.