CVE-2011-1529: Mit Kerberos 5

High severity, CVSS 7.8. EPSS: 4% chance of exploitation in the next 30 days.

The lookup_lockout_policy function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8 through 1.8.4 and 1.9 through 1.9.1, when the db2 (aka Berkeley DB) or LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via vectors that trigger certain process_as_req errors.

Affected products

• Mit Kerberos 5: version 1.8 only; version 1.8.1 only; version 1.8.2 only; version 1.8.3 only; version 1.8.4 only; version 1.9 only; …

Published 2011-10-20. Last modified 2026-06-16.