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ISC BIND < 9.3.3 DNS Message Malformed TSIG Remote DoS

Medium

Synopsis

The remote host is vulnerable to a Denial of Service (DoS) attack.

Description

The remote BIND DNS server is vulnerable to a flaw in the way that it handles TSIG responses. An attacker exploiting this flaw would need to have the ability to send malformed responses to the vulnerable DNS Server. Successful exploitation would lead to the BIND server crashing.

Solution

Upgrade to version 9.3.3 or higher.