CVE-2009-0845: Mit Kerberos

Medium severity, CVSS 5.0. EPSS: 5.6% chance of exploitation in the next 30 days.

The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.

Affected products

• Mit Kerberos: version 5-1.6.3 only
• Mit Kerberos 5: version 1.5 only; version 1.5.1 only; version 1.5.2 only; version 1.5.3 only; version 1.6 only; version 1.6.1 only; …

Published 2009-03-27. Last modified 2026-06-16.