[ GLSA 200404-09 ] Cross-realm trust vulnerability in Heimdal

[GLSA]

Gentoo Linux Security Advisory

Title: Cross-realm trust vulnerability in Heimdal (GLSA 200404-09)
Severity: normal
Exploitable: local
Date: April 09, 2004
Bug(s): #46590
ID: 200404-09

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: app-crypt/heimdal
Vulnerable: <= 0.6.0
Unaffected: >= 0.6.1
Architectures: All supported architectures


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: