USN-1139-1: Bind vulnerabilities

30 May 2011

bind9 vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS

Summary

An attacker could send crafted input to Bind and cause it to crash.

Software Description

  • bind9 - Internet Domain Name Server

Details

It was discovered that Bind incorrectly handled certain bad signatures if multiple trust anchors existed for a single zone. A remote attacker could use this flaw to cause Bind to stop responding, resulting in a denial of service. This issue only affected Ubuntu 8.04 LTS and 10.04 LTS. (CVE-2010-3762)

Frank Kloeker and Michael Sinatra discovered that Bind incorrectly handled certain very large RRSIG RRsets included in negative responses. A remote attacker could use this flaw to cause Bind to stop responding, resulting in a denial of service. (CVE-2011-1910)

Update instructions

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

Ubuntu 11.04
libdns69 - 1:9.7.3.dfsg-1ubuntu2.1
Ubuntu 10.10
libdns66 - 1:9.7.1.dfsg.P2-2ubuntu0.3
Ubuntu 10.04 LTS
libdns64 - 1:9.7.0.dfsg.P1-1ubuntu0.2
Ubuntu 8.04 LTS
libdns36 - 1:9.4.2.dfsg.P2-2ubuntu0.7

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References