krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens
Published Aug 14, 2014
7.8
HIGHCVSS 2.0
EPSS 6.61%
Description
The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty continuation token at a certain point during a SPNEGO negotiation.
Affected products
No data.
Configuration 1
- 7.0
Configuration 2
- 7.0
- 7.0
- 7.0
- 7.0
Configuration 3
- 1.10
- 1.10.1
- 1.10.2
- 1.10.3
- 1.10.4
- 1.11
- 1.11.1
- 1.11.2
- 1.11.3
- 1.11.4
- 1.11.5
- 1.12
- 1.12.1
No data.
Red Hat Enterprise Linux 5
krb5-0:1.6.1-78.el5
Fixed · RHSA-2014:1245
Red Hat Enterprise Linux 6
krb5-0:1.10.3-33.el6
Fixed · RHSA-2014:1389
Red Hat Enterprise Linux 7
krb5-0:1.12.2-14.el7
Fixed · RHSA-2015:0439
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | krb5-0:1.6.1-78.el5 | Fixed | RHSA-2014:1245 |
| Red Hat Enterprise Linux 6 | krb5-0:1.10.3-33.el6 | Fixed | RHSA-2014:1389 |
| Red Hat Enterprise Linux 7 | krb5-0:1.12.2-14.el7 | Fixed | RHSA-2015:0439 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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:C
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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.61% (0.06614) | 93.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.61% (0.06614) | 92.97th | v5 (v2026.06.15) |
| Mar 3, 2026 | 5.27% (0.05270) | 89.86th | v4 (v2025.03.14) |
| Nov 9, 2025 | 9.11% (0.09108) | 92.30th | v4 (v2025.03.14) |
| Jun 4, 2025 | 6.99% (0.06988) | 90.95th | v4 (v2025.03.14) |
| Mar 30, 2025 | 9.11% (0.09108) | 91.89th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.37% (0.12372) | 89.78th | v4 (v2025.03.14) |
| Mar 17, 2025 | 9.11% (0.09108) | 92.06th | v4 (v2025.03.14) |
| Dec 17, 2024 | 21.33% (0.21334) | 96.43th | v3 (v2023.03.01) |
| Jun 26, 2024 | 11.69% (0.11690) | 95.32th | v3 (v2023.03.01) |
| Mar 26, 2024 | 15.65% (0.15651) | 95.79th | v3 (v2023.03.01) |
| Feb 7, 2024 | 12.43% (0.12433) | 94.94th | v3 (v2023.03.01) |
| Mar 7, 2023 | 12.36% (0.12362) | 94.48th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.36% (0.04358) | 88.02th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.36% (0.04358) | 86.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.36% (0.04358) | 70.59th | v2 (v2022.01.01) |
References (22)
- http://advisories.mageia.org/MGASA-2014-0345.html x_refsource_CONFIRM
- http://aix.software.ibm.com/aix/efixes/security/nas_advisory1.asc x_refsource_CONFIRM
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7970 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136360.html vendor-advisoryx_refsource_FEDORA
- http://rhn.redhat.com/errata/RHSA-2015-0439.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/59102 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/60082 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/60448 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61051 third-party-advisoryx_refsource_SECUNIA
- http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15561.html x_refsource_CONFIRM
- http://www.debian.org/security/2014/dsa-3000 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:165 vendor-advisoryx_refsource_MANDRIVA
- http://www.osvdb.org/109389 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/69160 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1030706 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2014-4344 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1121877 x_refsource_CONFIRMIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/95210 vdb-entryx_refsource_XF
- https://github.com/krb5/krb5/commit/524688ce87a15fc75f87efc8c039ba4c7d5c197b x_refsource_CONFIRM
- https://github.com/krb5/krb5/commit/a7886f0ed1277c69142b14a2c6629175a6331edc x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-4344
- https://www.cve.org/CVERecord?id=CVE-2014-4344
Change history (0)
No recorded changes yet.