NULL pointer dereference vulnerability in validate_as_request function in MIT Kerberos 5 (krb5) before 1.13.6 and 1.4.x before 1.14.3 allows remote authenticated users to cause denial of service

CVE-2016-3120 · MEDIUM Severity

AV:N/AC:L/AU:S/C:N/I:N/A:P

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.

Learn more about our Cis Benchmark Audit For Mit Kerberos.