- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200801-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: MaraDNS: CNAME Denial of Service Date: January 29, 2008 Bugs: #204351 ID: 200801-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== MaraDNS is prone to a Denial of Service vulnerability impacting CNAME resolution. Background ========== MaraDNS is a package that implements the Domain Name Service (DNS) with resolver and caching ability. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/maradns < 1.2.12.08 >= 1.2.12.08 Description =========== Michael Krieger reported that a specially crafted DNS could prevent an authoritative canonical name (CNAME) record from being resolved because of an "improper rotation of resource records". Impact ====== A remote attacker could send specially crafted DNS packets to a vulnerable server, making it unable to resolve CNAME records. Workaround ========== Add "max_ar_chain = 2" to the "marac" configuration file. Resolution ========== All MaraDNS users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/maradns-1.2.12.09" References ========== [ 1 ] CVE-2008-0061 http://cve.mitre.org/cgi-bin/cvename.cgi...-2008-0061 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200801-16.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 (at) gentoo (dot) org [email concealed] or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2008 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.7 (GNU/Linux) iQEVAwUBR5+vmzvRww8BFPxFAQKd3AgAjZ1YfJYCsvi/hDb+5Ay5FLhZsCBoj0zf wQ+SJaAjY33oe/GWO3CL/akkiY1WI+F49L20C1410JLELDInY/X4PJ03HSFm+BGN CTyGJ7pQd06RwAaaa/wLXqDBdsekm3MbF5c3T4UF0vDXriVDw9MSslTpP+AIRwJ+ GOgT7NhOpJhhVc1czfurTu4ahfayI70QpD9ZuuDu2TRlseqqGPz9b5LFJwPOl4H7 4vUSgAp75hPfpV2MTzyz/C0ITBhlK1//s1B/IIZErtvQTcWDuAUtnulLI/KzJVsm J4ub6Oqe3BmkMXnhuQVMJknGUA1Fv+dWf2xoaMEuffQZ99jXIkBh4w== =YiWm -----END PGP SIGNATURE----- [ reply ]
