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

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Debian Security Advisory DSA-2174-1 security@debian.org
http://www.debian.org/security/ Thijs Kinkhorst
February 26, 2011 http://www.debian.org/security/faq
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Package : avahi
Vulnerability : denial of service
Problem type : remote
Debian-specific: no
CVE ID : CVE-2011-1002
Debian Bug : 614785

It was discovered that avahi, an implementation of the zeroconf protocol,
can be crashed remotely by a single UDP packet, which may result in a
denial of service.

For the oldstable distribution (lenny), this problem has been fixed in
version 0.6.23-3lenny3.

For the stable distribution (squeeze), this problem has been fixed in
version 0.6.27-2+squeeze1.

For the testing (wheezy) and unstable distribution (sid), this problem
has been fixed in version 0.6.28-4.

We recommend that you upgrade your avahi 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/