USN-1258-1: ClamAV vulnerability

10 November 2011

clamav vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


ClamAV could be made to crash or run programs as your login if it opened a specially crafted file.

Software Description

  • clamav - Anti-virus utility for Unix


Stephane Chazelas discovered the bytecode engine of ClamAV improperly handled recursion under certain circumstances. This could allow a remote attacker to craft a file that could cause ClamAV to crash, resulting in a denial of service.

Update instructions

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

Ubuntu 11.10
libclamav6 - 0.97.3+dfsg-1ubuntu0.11.10.1
Ubuntu 11.04
libclamav6 - 0.97.3+dfsg-1ubuntu0.11.04.1
Ubuntu 10.10
libclamav6 - 0.96.5+dfsg-1ubuntu1.10.10.3
Ubuntu 10.04 LTS
libclamav6 - 0.96.5+dfsg-1ubuntu1.10.04.3

To update your system, please follow these instructions:

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