[USN-1783-1] Bind vulnerability

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==========================================================================
Ubuntu Security Notice USN-1783-1
March 29, 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

Summary:

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

Software Description:
- bind9: Internet Domain Name Server

Details:

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

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

References:
http://www.ubuntu.com/usn/usn-1783-1
CVE-2013-2266

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.8.1.dfsg.P1-4.2ubuntu3.2
https://launchpad.net/ubuntu/+source/bind9/1:9.8.1.dfsg.P1-4ubuntu0.6
https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu4.6
https://launchpad.net/ubuntu/+source/bind9/1:9.7.0.dfsg.P1-1ubuntu0.9