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=========================================================== Ubuntu Security Notice USN-846-1 October 08, 2009 icu vulnerability CVE-2009-0153 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: libicu38 3.8-6ubuntu0.2 Ubuntu 8.10: libicu38 3.8.1-2ubuntu0.2 Ubuntu 9.04: libicu38 3.8.1-3ubuntu1.1 After a standard system upgrade you need to restart applications linked against libicu, such as OpenOffice.org, to effect the necessary changes. Details follow: 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.