USN-747-1: ICU vulnerability

26 March 2009

icu vulnerability

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software Description

  • icu


It was discovered that libicu did not correctly handle certain invalid encoded data. If a user or automated system were tricked into processing specially crafted data with applications linked against libicu, certain content filters could be bypassed.

Update instructions

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

Ubuntu 8.10
libicu38 - 3.8.1-2ubuntu0.1
Ubuntu 8.04 LTS
libicu38 - 3.8-6ubuntu0.1
Ubuntu 7.10
libicu36 - 3.6-3ubuntu0.2
Ubuntu 6.06 LTS
libicu34 - 3.4.1a-1ubuntu1.6.06.2

To update your system, please follow these instructions:

After a standard system upgrade you need to restart applications linked against libicu, such as, to effect the necessary changes.