USN-418-1: Bind vulnerabilities

Ubuntu Security Notice USN-418-1

5th 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


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 version:

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.


CVE-2007-0493, CVE-2007-0494