- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200701-14 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Mod_auth_kerb: Denial of Service Date: January 22, 2007 Bugs: #155782 ID: 200701-14 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Mod_auth_kerb is vulnerable to a buffer overflow possibly allowing a Denial of Service. Background ========== Mod_auth_kerb is an Apache authentication module using Kerberos. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-www/mod_auth_kerb < 5.0_rc7-r1 >= 5.0_rc7-r1 Description =========== Mod_auth_kerb improperly handles component byte encoding in the der_get_oid() function, allowing for a buffer overflow to occur if there are no components which require more than one byte for encoding. Impact ====== An attacker could try to access a Kerberos protected resource on an Apache server with an incorrectly configured service principal and crash the server process. It is important to note that this buffer overflow is not known to allow for the execution of code. Workaround ========== There is no known workaround at this time. Resolution ========== All mod_auth_kerb users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-www/mod_auth_kerb-5.0_rc7-r1" References ========== [ 1 ] CVE-2006-5989 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5989 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200701-14.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 2007 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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