USN-747-1: ICU vulnerability

Ubuntu Security Notice USN-747-1

26th 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 version:

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.