- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200611-13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Avahi: "netlink" message vulnerability Date: November 20, 2006 Bugs: #154322 ID: 200611-13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Avahi fails to verify the origin of netlink messages, which could allow local users to spoof network changes. Background ========== Avahi is a system that facilitates service discovery on a local network. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/avahi < 0.6.15 >= 0.6.15 Description =========== Avahi does not check that the netlink messages come from the kernel instead of a user-space process. Impact ====== A local attacker could exploit this vulnerability by crafting malicious netlink messages and trick Avahi to react to fake network changes. This could lead users to connect to untrusted services without knowing. 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-0.6.15" References ========== [ 1 ] CVE-2006-5461 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5461 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200611-13.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@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2006 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. http://creativecommons.org/licenses/by-sa/2.5
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