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Cross-realm trust vulnerability in Heimdal


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


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

2.  Impact Information


Heimdal is a free implementation of Kerberos 5.


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.


Remote attackers with control of a realm may be able to impersonate other users in the cross-realm trust path.

3.  Resolution Information


A workaround is not currently known for this issue. All users are advised to upgrade to the latest version of the affected package.


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


Page updated April 09, 2004

Summary: This is a Gentoo Linux Security Advisory

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