USN-846-1: ICU vulnerability

8 October 2009

icu vulnerability

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

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • icu


It was discovered that ICU did not properly handle invalid byte sequences during Unicode conversion. If an application using ICU processed crafted data, content security mechanisms could be bypassed, potentially leading to cross-site scripting (XSS) attacks.

Update instructions

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

Ubuntu 9.04
libicu38 - 3.8.1-3ubuntu1.1
Ubuntu 8.10
libicu38 - 3.8.1-2ubuntu0.2
Ubuntu 8.04 LTS
libicu38 - 3.8-6ubuntu0.2

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.