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USN-418-1: Bind vulnerabilities

6 February 2007

Bind vulnerabilities



A flaw was discovered in Bind's DNSSEC validation code. Remote
attackers could send a specially crafted DNS query which would cause the
Bind server to crash, resulting in a denial of service. Only servers
configured to use DNSSEC extensions were vulnerable.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 6.10
  • libdns21 - 1:9.3.2-2ubuntu3.1
Ubuntu 6.06
  • libdns21 - 1:9.3.2-2ubuntu1.2
Ubuntu 5.10
  • libdns20 - 1:9.3.1-2ubuntu1.2

In general, a standard system upgrade is sufficient to effect the
necessary changes.