GLSA 200404-09: Cross-realm trust vulnerability in Heimdal
Posted on: 04/09/2004 11:44 AM

A Heimdal update has been released for Gentoo Linux

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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
=================

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Package / Vulnerable / Unaffected
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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.


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