GLSA 200404-09: Cross-realm trust vulnerability in Heimdal

http://security.gentoo.org/

Severity:	normal
Title:	Cross-realm trust vulnerability in Heimdal
Date:	04/09/2004
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
app-crypt/heimdal	<= 0.6.0	>= 0.6.1	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:

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

References

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

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 https://bugs.gentoo.org.