The International Components for Unicode (ICU) library provides robust and full-featured Unicode services.
A flaw was found in the way ICU processed certain, invalid byte sequences during Unicode conversion. If an application used ICU to decode malformed, multibyte character data, it may have been possible to bypass certain content protection mechanisms, or display information in a manner misleading to the user. (CVE-2009-0153)
All users of icu should upgrade to these updated packages, which contain backported patches to resolve this issue.