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Gentoo Linux Security Advisory GLSA 200404-09
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http://security.gentoo.org
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Severity: Normal
Title: Cross-realm trust vulnerability in Heimdal
Date: April 09, 2004
Bugs: #46590
ID: 200404-09
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Synopsis
========
Heimdal contains cross-realm vulnerability allowing someone with
control over a realm to impersonate anyone in the cross-realm trust
path.
Background
==========
Heimdal is a free implementation of Kerberos 5.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
app-crypt/heimdal <= 0.6.0 >= 0.6.1
Description
===========
Heimdal does not properly perform certain consistency checks for
cross-realm requests, which allows remote attackers with control of a
realm to impersonate others in the cross-realm trust path.
Impact
======
Remote attackers with control of a realm may be able to impersonate
other users in the cross-realm trust path.
Workaround
==========
A workaround is not currently known for this issue. All users are
advised to upgrade to the latest version of the affected package.
Resolution
==========
Heimdal users should upgrade to version 0.6.1 or later:
# emerge sync
# emerge -pv ">=app-crypt/heimdal-0.6.1"
# emerge ">=app-crypt/heimdal-0.6.1"
References
==========
[ 1 ] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0371
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.
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200404-09.xml
Copyright/License
==================
Copyright 2004 Gentoo Technologies, Inc.
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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