USN-706-1: Bind vulnerability

Ubuntu Security Notice USN-706-1

8th January, 2009

bind9 vulnerability

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software description

  • bind9


It was discovered that Bind did not properly perform signature verification.
When DNSSEC with DSA signatures are in use, a remote attacker could exploit
this to bypass signature validation to spoof DNS entries and poison DNS
caches. Among other things, this could lead to misdirected email and web

Update instructions

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

Ubuntu 8.10:
libdns43 1:9.5.0.dfsg.P2-1ubuntu3.1
Ubuntu 8.04 LTS:
libdns35 1:9.4.2.dfsg.P2-2ubuntu0.1
Ubuntu 7.10:
libdns32 1:9.4.1-P1-3ubuntu2.1
Ubuntu 6.06 LTS:
libdns21 1:9.3.2-2ubuntu1.6

To update your system, please follow these instructions:

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