USN-1258-1: ClamAV vulnerability

Ubuntu Security Notice USN-1258-1

10th 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 version:

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.