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[ GLSA 200909-19 ] Dnsmasq: Multiple vulnerabilities
From: Alex Legler <a3li () gentoo org>
Date: Sun, 20 Sep 2009 20:58:46 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200909-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Dnsmasq: Multiple vulnerabilities Date: September 20, 2009 Bugs: #282653 ID: 200909-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities in Dnsmasq might result in the remote execution of arbitrary code, or a Denial of Service. Background ========== Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server. It includes support for Trivial FTP (TFTP). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/dnsmasq < 2.5.0 >= 2.5.0 Description =========== Multiple vulnerabilities have been reported in the TFTP functionality included in Dnsmasq: * Pablo Jorge and Alberto Solino discovered a heap-based buffer overflow (CVE-2009-2957). * An anonymous researcher reported a NULL pointer reference (CVE-2009-2958). Impact ====== A remote attacker in the local network could exploit these vulnerabilities by sending specially crafted TFTP requests to a machine running Dnsmasq, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the daemon, or a Denial of Service. NOTE: The TFTP server is not enabled by default. Workaround ========== You can disable the TFTP server either at buildtime by not enabling the "tftp" USE flag, or at runtime. Make sure "--enable-tftp" is not set in the DNSMASQ_OPTS variable in the /etc/conf.d/dnsmasq file and "enable-tftp" is not set in /etc/dnsmasq.conf, either of which would enable TFTP support if it is compiled in. Resolution ========== All Dnsmasq users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose =net-dns/dnsmasq-2.5.0 References ========== [ 1 ] CVE-2009-2957 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2957 [ 2 ] CVE-2009-2958 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2958 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200909-19.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 200909-19 ] Dnsmasq: Multiple vulnerabilities Alex Legler (Sep 20)