CVE-2013-1417
krb5: KDC null deref due to referrals
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · June 21, 2013
Updated · November 21, 2025
Description
do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.11 before 1.11.4, when a single-component realm name is used, allows remote authenticated users to cause a denial of service (daemon crash) via a TGS-REQ request that triggers an attempted cross-realm referral for a host-based service principal.
Statement
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 5 and 6.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 3.5AV:N/AC:M/Au:S/C:N/I:N/A:P
CWE-476 · NULL Pointer Dereference