krb5: KDC null deref due to referrals
Published Nov 20, 2013
3.5
LOWCVSS 2.0
EPSS 1.93%
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.
Affected products
No data.
- 1.11
- 1.11.1
- 1.11.2
- 1.11.3
No data.
Red Hat Enterprise Linux 5
krb5
Not affected
Red Hat Enterprise Linux 6
krb5
Not affected
Red Hat Enterprise Linux 7
krb5
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | krb5 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | krb5 | Not affected | n/a |
| Red Hat Enterprise Linux 7 | krb5 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.93% (0.01932) | 79.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.93% (0.01932) | 77.31th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.54% (0.00543) | 65.72th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.08% (0.01077) | 84.04th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.34% (0.03344) | 89.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.13% (0.01132) | 56.11th | v2 (v2022.01.01) |
| Sep 22, 2022 | 1.13% (0.01132) | 54.59th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.13% (0.01132) | 52.58th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.13% (0.01132) | 30.65th | v2 (v2022.01.01) |
References (7)
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00026.html vendor-advisoryx_refsource_SUSE
- http://web.mit.edu/kerberos/krb5-1.11/README-1.11.4.txt x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2013-1417 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1030743 x_refsource_CONFIRMIssue Tracking
- https://github.com/krb5/krb5/commit/4c023ba43c16396f0d199e2df1cfa59b88b62acc x_refsource_CONFIRMExploitPatch
- https://nvd.nist.gov/vuln/detail/CVE-2013-1417
- https://www.cve.org/CVERecord?id=CVE-2013-1417
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2013-12/msg00026.html | vendor-advisoryx_refsource_SUSE | |
| http://web.mit.edu/kerberos/krb5-1.11/README-1.11.4.txt | x_refsource_CONFIRM | |
| https://access.redhat.com/security/cve/CVE-2013-1417 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1030743 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/krb5/krb5/commit/4c023ba43c16396f0d199e2df1cfa59b88b62acc | x_refsource_CONFIRMExploitPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-1417 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-1417 |
Change history (0)
No recorded changes yet.