Heimdal: Multiple local privilege escalation vulnerabilities

Background

Heimdal is a free implementation of Kerberos 5.

Description

The ftpd and rcp applications provided by Heimdal fail to check the return value of calls to seteuid().

Impact

A local attacker could exploit this vulnerability to execute arbitrary code with elevated privileges.

Workaround

There is no known workaround at this time.

Resolution

All Heimdal users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-crypt/heimdal-0.7.2-r3"