CVE-2012-1015: Mit Kerberos 5

High severity, CVSS 9.3. EPSS: 4.8% chance of exploitation in the next 30 days.

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

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 1.8.5 only; …

Published 2012-08-06. Last modified 2026-06-16.