USN-418-1: Bind vulnerabilities

6 February 2007

bind9 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10

Software Description


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 LTS
libdns21 - 1:9.3.2-2ubuntu1.2
Ubuntu 5.10
libdns20 - 1:9.3.1-2ubuntu1.2

To update your system, please follow these instructions:

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