krb5: PKINIT null pointer deref leads to DoS (pkinit_check_kdc_pkid())
Published Mar 3, 2013
5.0
MEDIUMCVSS 2.0
EPSS 3.66%
Description
The pkinit_check_kdc_pkid function in plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 and 1.11.x before 1.11.1 does not properly handle errors during extraction of fields from an X.509 certificate, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed KRB5_PADATA_PK_AS_REQ AS-REQ request.
Affected products
No data.
Configuration 1
- < 1.10.4
- 1.11
No data.
Red Hat Enterprise Linux 6
krb5-0:1.10.3-10.el6_4.1
Fixed · RHSA-2013:0656
Red Hat Enterprise Linux 5
krb5
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | krb5-0:1.10.3-10.el6_4.1 | Fixed | RHSA-2013:0656 |
| Red Hat Enterprise Linux 5 | krb5 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 5 as they did not include support for PKINIT.
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:L/Au:N/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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 3.66% (0.03660) | 89.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.21% (0.04211) | 89.65th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.74% (0.00740) | 70.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.85% (0.01847) | 71.90th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.74% (0.00740) | 71.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 6.52% (0.06521) | 94.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 6.52% (0.06521) | 92.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (13)
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7570 x_refsource_CONFIRMVendor Advisory
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7577 x_refsource_CONFIRMVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-03/msg00090.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://secunia.com/advisories/55040 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://web.mit.edu/kerberos/krb5-1.11/
- http://web.mit.edu/kerberos/www/krb5-1.10/ x_refsource_CONFIRMRelease NotesVendor Advisory
- http://web.mit.edu/kerberos/www/krb5-1.11/ x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:157 vendor-advisoryx_refsource_MANDRIVAThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2013-1415 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=914749 Issue Tracking
- https://github.com/krb5/krb5/commit/f249555301940c6df3a2cdda13b56b5674eebc2e x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2013-1415
- https://www.cve.org/CVERecord?id=CVE-2013-1415
Change history (0)
No recorded changes yet.