CVE-2000-0546: Cygnus Network Security Project Cygnus Network Security

Medium severity, CVSS 5.0. EPSS: 2.9% chance of exploitation in the next 30 days.

Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the lastrealm variable in the set_tgtkey function.

Affected products

• Cygnus Network Security Project Cygnus Network Security: affected versions not specified
• Kerbnet Project Kerbnet: affected versions not specified
• Mit Kerberos: before 4.0 (fixed in 4.0); version 4.0 only
• Mit Kerberos 5: from 1.0, up to and including 1.0.7; version 1.1 only; version 1.1.1 only

Published 2000-06-09. Last modified 2026-06-16.