An icu security update has been released for Debian GNU/Linux

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Debian Security Advisory DSA-2397-1 security@debian.org
http://www.debian.org/security/ Moritz Muehlenhoff
January 29, 2012 http://www.debian.org/security/faq
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Package : icu
Vulnerability : buffer underflow
Problem type : remote
Debian-specific: no
CVE ID : CVE-2011-4599

It was discovered that a buffer overflow in the Unicode libraray ICU
could lead to the execution of arbitrary code.

For the oldstable distribution (lenny), this problem has been fixed in
version 3.8.1-3+lenny3.

For the stable distribution (squeeze), this problem has been fixed in
version 4.4.1-8.

For the unstable distribution (sid), this problem has been fixed in
version 4.8.1.1-3.

We recommend that you upgrade your icu packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/