Date: Mon, 06 Sep 2004 10:39:55 +0200
From: Thierry Carrez <[email protected]>
To: [email protected]Subject: [ GLSA 200409-09 ] MIT krb5: Multiple vulnerabilities
Cc: [email protected], [email protected],
[email protected]
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Gentoo Linux Security Advisory GLSA 200409-09
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http://security.gentoo.org/
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Severity: High
Title: MIT krb5: Multiple vulnerabilities
Date: September 06, 2004
Bugs: #62417
ID: 200409-09
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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
[email protected] 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
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