Gentoo alert 200904-10 (avahi)
| From: | Robert Buchholz <rbu@gentoo.org> | |
| To: | gentoo-announce@lists.gentoo.org | |
| Subject: | [gentoo-announce] [ GLSA 200904-10 ] Avahi: Denial of Service | |
| Date: | Thu, 9 Apr 2009 00:48:04 +0200 | |
| Message-ID: | <200904090048.09963.rbu@gentoo.org> | |
| Cc: | bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk, security-alerts@linuxsecurity.com | |
| Archive‑link: | Article |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200904-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Avahi: Denial of Service Date: April 08, 2009 Bugs: #260971 ID: 200904-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== An error in Avahi might lead to a Denial of Service via network and CPU consumption. Background ========== Avahi is a system that facilitates service discovery on a local network. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/avahi < 0.6.24-r2 >= 0.6.24-r2 Description =========== Rob Leslie reported that the originates_from_local_legacy_unicast_socket() function in avahi-core/server.c does not account for the network byte order of a port number when processing incoming multicast packets, leading to a multicast packet storm. Impact ====== A remote attacker could send specially crafted legacy unicast mDNS query packets to the Avahi daemon, resulting in a Denial of Service due to network bandwidth and CPU consumption. 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-r2" References ========== [ 1 ] CVE-2009-0758 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0758 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200904-10.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 http://bugs.gentoo.org. License ======= Copyright 2009 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