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[ GLSA 200908-08 ] ISC DHCP: dhcpd Denial of Service
From: Alex Legler <a3li () gentoo org>
Date: Tue, 18 Aug 2009 23:37:39 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200908-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: ISC DHCP: dhcpd Denial of Service Date: August 18, 2009 Bugs: #275231 ID: 200908-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== dhcpd as included in the ISC DHCP implementation does not properly handle special conditions, leading to a Denial of Service. Background ========== ISC DHCP is the reference implementation of the Dynamic Host Configuration Protocol as specified in RFC 2131. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/dhcp < 3.1.2_p1 >= 3.1.2_p1 Description =========== Christoph Biedl discovered that dhcpd does not properly handle certain DHCP requests when configured both using "dhcp-client-identifier" and "hardware ethernet". Impact ====== A remote attacker might send a specially crafted request to dhcpd, possibly resulting in a Denial of Service (daemon crash). Workaround ========== There is no known workaround at this time. Resolution ========== All ISC DHCP users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose =net-misc/dhcp-3.1.2_p1 References ========== [ 1 ] CVE-2009-1892 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1892 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200908-08.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 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
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- [ GLSA 200908-08 ] ISC DHCP: dhcpd Denial of Service Alex Legler (Aug 18)