Public Date:
949984: CVE-2013-1416 krb5: NULL pointer dereference (DoS, KDC crash) by processing certain TGS requests

The MITRE CVE dictionary describes this issue as:

The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.5 does not properly perform service-principal realm referral, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS-REQ request.

Find out more about CVE-2013-1416 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 4 and 5.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4
Base Metrics AV:N/AC:L/Au:S/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (krb5) RHSA-2013:0748 2013-04-16

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 krb5 Not affected
Red Hat Enterprise Linux 4 krb5 Not affected