A vulnerability has been reported in ISC BIND, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the DNS64 IPv6 transition mechanism when handling certain queries, which can be exploited to trigger a REQUIRE assertion and crash the server via a specially crafted DNS query.
Successful exploitation requires that DNS64 is turned on.
The vulnerability is reported in versions 9.8.0 through 9.8.4 and 9.9.0 through 9.9.2.
Solution: Update to version 9.8.4-P1 or 9.9.2-P1.
Provided and/or discovered by: The vendor credits BlueCat Networks.
Original Advisory: https://kb.isc.org/article/AA-00828
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Subject: ISC BIND DNS64 REQUIRE Assertion Failure Denial of Service Vulnerability
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