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Cross-realm trust vulnerability in Heimdal

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200404-09 / heimdal
Release Date April 09, 2004
Latest Revision April 09, 2004: 01
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
app-crypt/heimdal <= 0.6.0 >= 0.6.1 All supported architectures

Related bugreports: #46590

Synopsis

Heimdal contains cross-realm vulnerability allowing someone with control over a realm to impersonate anyone in the cross-realm trust path.

2.  Impact Information

Background

Heimdal is a free implementation of Kerberos 5.

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.

3.  Resolution Information

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:

Code Listing 3.1: Resolution

# emerge sync

# emerge -pv ">=app-crypt/heimdal-0.6.1"
# emerge ">=app-crypt/heimdal-0.6.1"

4.  References



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Page updated April 09, 2004

Summary: This is a Gentoo Linux Security Advisory

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