CVE-2007-5939: Heimdal

High severity, CVSS 10.0. EPSS: 3.8% chance of exploitation in the next 30 days.

The gss_userok function in appl/ftp/ftpd/gss_userok.c in Heimdal 0.7.2 does not allocate memory for the ticketfile pointer before calling free, which allows remote attackers to have an unknown impact via an invalid username. NOTE: the vulnerability was originally reported for ftpd.c, but this is incorrect.

Affected products

• Heimdal Heimdal: version 0.7.2 only

Published 2007-12-06. Last modified 2026-06-16.