GLSA 200901-11: Avahi: Denial of Service

Severity:normal
Title:Avahi: Denial of Service
Date:01/14/2009
Bugs: #250913
ID:200901-11

Synopsis

A Denial of Service vulnerability has been discovered in Avahi.

Background

Avahi is a system that facilitates service discovery on a local network.

Affected packages

Package Vulnerable Unaffected Architecture(s)
net-dns/avahi < 0.6.24 >= 0.6.24 All supported architectures

Description

Hugo Dias reported a failed assertion in the originates_from_local_legacy_unicast_socket() function in avahi-core/server.c when processing mDNS packets with a source port of 0.

Impact

A remote attacker could send specially crafted packets to the daemon, leading to its crash.

Workaround

There is no known workaround at this time.

Resolution

All Avahi users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200901-11.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

Thank you!