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[ GLSA 200409-09 ] MIT krb5: Multiple vulnerabilities
From: Thierry Carrez <koon () gentoo org>
Date: Mon, 06 Sep 2004 10:39:55 +0200
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200409-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: MIT krb5: Multiple vulnerabilities Date: September 06, 2004 Bugs: #62417 ID: 200409-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== MIT krb5 contains several double-free vulnerabilities, potentially allowing the execution of arbitrary code, as well as a denial of service vulnerability. Background ========== MIT krb5 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 < 1.3.4 >= 1.3.4 Description =========== The implementation of the Key Distribution Center (KDC) and the MIT krb5 library contain double-free vulnerabilities, making client programs as well as application servers vulnerable. The ASN.1 decoder library is vulnerable to a denial of service attack, including the KDC. Impact ====== The double-free vulnerabilities could allow an attacker to execute arbitrary code on a KDC host and hosts running krb524d or vulnerable services. In the case of a KDC host, this can lead to a compromise of the entire Kerberos realm. Furthermore, an attacker impersonating a legitimate KDC or application server can potentially execute arbitrary code on authenticating clients. An attacker can cause a denial of service for a KDC or application server and clients, the latter if impersonating a legitimate KDC or application server. Workaround ========== There is no known workaround at this time. Resolution ========== All mit-krb5 users should upgrade to the latest stable version: # emerge sync # emerge -pv ">=app-crypt/mit-krb5-1.3.4" # emerge ">=app-crypt/mit-krb5-1.3.4" References ========== [ 1 ] MIT krb5 Security Advisory 2004-002 http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt [ 2 ] MIT krb5 Security Advisory 2004-003 http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-003-asn1.txt [ 3 ] CAN-2004-0642 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0642 [ 4 ] CAN-2004-0643 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0643 [ 5 ] CAN-2004-0644 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0644 [ 6 ] CAN-2004-0772 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0772 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200409-09.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 2004 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/1.0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFBPCJbvcL1obalX08RAiGSAKCYME7MmffM2RlxVja0Dfj8tpcdtQCeJXfe fuMJECEIhF8vkGnYuHZVusA= =IHAg -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
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- [ GLSA 200409-09 ] MIT krb5: Multiple vulnerabilities Thierry Carrez (Sep 06)