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[ GLSA 200507-11 ] MIT Kerberos 5: Multiple vulnerabilities
From: Sune Kloppenborg Jeppesen <jaervosz () gentoo org>
Date: Tue, 12 Jul 2005 21:08:32 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200507-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: MIT Kerberos 5: Multiple vulnerabilities Date: July 12, 2005 Bugs: #98799 ID: 200507-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== MIT Kerberos 5 is vulnerable to a Denial of Service attack and remote execution of arbitrary code, possibly leading to the compromise of the entire Kerberos realm. Background ========== MIT Kerberos 5 is the free implementation of the Kerberos network authentication protocol by the Massachusetts Institute of Technology. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-crypt/mit-krb5 < 1.4.1-r1 >= 1.4.1-r1 Description =========== Daniel Wachdorf discovered that MIT Kerberos 5 could corrupt the heap by freeing unallocated memory when receiving a special TCP request (CAN-2005-1174). He also discovered that the same request could lead to a single-byte heap overflow (CAN-2005-1175). Magnus Hagander discovered that krb5_recvauth() function of MIT Kerberos 5 might try to double-free memory (CAN-2005-1689). Impact ====== Although exploitation is considered difficult, a remote attacker could exploit the single-byte heap overflow and the double-free vulnerability to execute arbitrary code, which could lead to the compromise of the whole Kerberos realm. A remote attacker could also use the heap corruption to cause a Denial of Service. Workaround ========== There are no known workarounds at this time. Resolution ========== All MIT Kerberos 5 users should upgrade to the latest available version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.4.1-r1" References ========== [ 1 ] CAN-2005-1174 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1174 [ 2 ] CAN-2005-1175 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1175 [ 3 ] CAN-2005-1689 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1689 [ 4 ] MITKRB5-SA-2005-002 http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-002-kdc.txt [ 5 ] MITKRB5-SA-2005-003 http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-003-recvauth.txt Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200507-11.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 2005 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/2.0
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- [ GLSA 200507-11 ] MIT Kerberos 5: Multiple vulnerabilities Sune Kloppenborg Jeppesen (Jul 12)