krb5: PKINIT null pointer deref leads to DoS
Published Mar 3, 2013
5.0
MEDIUMCVSS 2.0
EPSS 2.58%
Description
The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.
Affected products
No data.
- < 1.10.4
No data.
Red Hat Enterprise Linux 6
krb5-0:1.10.3-10.el6_4.1
Fixed · RHSA-2013:0656
Red Hat Enterprise Linux 4
krb5
Not affected
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 4 | krb5 | Not affected | n/a |
| 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 1, 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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.58% (0.02576) | 84.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.58% (0.02576) | 83.12th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.64% (0.00643) | 68.19th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.01% (0.02006) | 72.86th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.64% (0.00643) | 68.88th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.88% (0.00879) | 83.18th | v3 (v2023.03.01) |
| Feb 28, 2024 | 0.88% (0.00879) | 82.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.88% (0.00879) | 79.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (8)
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7527 x_refsource_CONFIRMVendor Advisory
- http://secunia.com/advisories/55040 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://web.mit.edu/kerberos/www/krb5-1.10/ x_refsource_CONFIRMRelease NotesVendor Advisory
- https://access.redhat.com/security/cve/CVE-2012-1016 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=917840 Issue Tracking
- https://github.com/krb5/krb5/commit/db64ca25d661a47b996b4e2645998b5d7f0eb52c x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2012-1016
- https://www.cve.org/CVERecord?id=CVE-2012-1016
| Link | Providers | Tags |
|---|---|---|
| http://krbdev.mit.edu/rt/Ticket/Display.html?id=7527 | x_refsource_CONFIRMVendor Advisory | |
| http://secunia.com/advisories/55040 | third-party-advisoryx_refsource_SECUNIAThird Party Advisory | |
| http://web.mit.edu/kerberos/www/krb5-1.10/ | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2012-1016 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=917840 | Issue Tracking | |
| https://github.com/krb5/krb5/commit/db64ca25d661a47b996b4e2645998b5d7f0eb52c | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-1016 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-1016 |
Change history (0)
No recorded changes yet.