USN-1783-1: Bind vulnerability

29 March 2013

bind9 vulnerability

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS


Bind could be made to consume memory or crash if it received specially crafted network traffic.

Software Description

  • bind9 - Internet Domain Name Server


Matthew Horsfall discovered that Bind incorrectly handled regular expression checking. A remote attacker could use this flaw to cause Bind to consume an excessive amount of memory, possibly resulting in a denial of service. This issue was corrected by disabling RDATA regular expression syntax checking.

Update instructions

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

Ubuntu 12.10
bind9 - 1:9.8.1.dfsg.P1-4.2ubuntu3.2
libdns81 - 1:9.8.1.dfsg.P1-4.2ubuntu3.2
Ubuntu 12.04 LTS
bind9 - 1:9.8.1.dfsg.P1-4ubuntu0.6
libdns81 - 1:9.8.1.dfsg.P1-4ubuntu0.6
Ubuntu 11.10
bind9 - 1:9.7.3.dfsg-1ubuntu4.6
libdns69 - 1:9.7.3.dfsg-1ubuntu4.6
Ubuntu 10.04 LTS
bind9 - 1:9.7.0.dfsg.P1-1ubuntu0.9
libdns64 - 1:9.7.0.dfsg.P1-1ubuntu0.9

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.