A libxfont security update has been released for Debian

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Debian Security Advisory DSA-2293-1 security@debian.org
http://www.debian.org/security/ Thijs Kinkhorst
August 12, 2011 http://www.debian.org/security/faq
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Package : libxfont
Vulnerability : buffer overflow
Problem type : local
Debian-specific: no
CVE ID : CVE-2011-2895

Tomas Hoger found a buffer overflow in the X.Org libXfont library,
which may allow for a local privilege escalation through crafted
font files.

For the oldstable distribution (lenny), this problem has been fixed in
version 1.3.3-2.

For the stable distribution (squeeze), this problem has been fixed in
version 1.4.1-3.

For the unstable distribution (sid), this problem has been fixed in
version 1.4.4-1.

We recommend that you upgrade your libxfont 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/