Heimdal: Buffer overflow vulnerabilities

Background

Heimdal is a free implementation of Kerberos 5 that includes a telnetd server.

Description

It has been reported that the “getterminaltype” function of Heimdal’s telnetd server is vulnerable to buffer overflows.

Impact

An attacker could exploit this vulnerability to execute arbitrary code with the permission of the telnetd server program.

Workaround

There is no known workaround at this time.

Resolution

All users should upgrade to the latest available version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-crypt/heimdal-0.6.5"