MEDIUM
krb5: NULL pointer dereference in GSSAPI SPNEGO (MITKRB5-SA-2009-001)
Published Mar 27, 2009
5.0
MEDIUMCVSS 2.0
EPSS 5.63%
Description
The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.
Affected products
No data.
OR
- 5-1.6.3
- 1.5
- 1.5.1
- 1.5.2
- 1.5.3
- 1.6
- 1.6.1
- 1.6.2
No data.
Red Hat Enterprise Linux 5
krb5-0:1.6.1-31.el5_3.3
Fixed · RHSA-2009:0408
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | krb5-0:1.6.1-31.el5_3.3 | Fixed | RHSA-2009:0408 |
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.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.63% 0.05628
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.05628
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 (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.63% (0.05628) | 92.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.63% (0.05628) | 91.92th | v5 (v2026.06.15) |
| Jan 18, 2026 | 19.31% (0.19309) | 95.17th | v4 (v2025.03.14) |
| Dec 10, 2025 | 23.24% (0.23242) | 95.74th | v4 (v2025.03.14) |
| Dec 1, 2025 | 17.71% (0.17709) | 94.89th | v4 (v2025.03.14) |
| Nov 9, 2025 | 16.38% (0.16375) | 94.57th | v4 (v2025.03.14) |
| Oct 13, 2025 | 31.21% (0.31212) | 96.51th | v4 (v2025.03.14) |
| Mar 30, 2025 | 29.28% (0.29280) | 96.19th | v4 (v2025.03.14) |
| Mar 29, 2025 | 39.84% (0.39838) | 95.96th | v4 (v2025.03.14) |
| Mar 21, 2025 | 29.28% (0.29280) | 96.21th | v4 (v2025.03.14) |
| Mar 17, 2025 | 24.99% (0.24988) | 95.70th | v4 (v2025.03.14) |
| Dec 17, 2024 | 8.26% (0.08260) | 94.37th | v3 (v2023.03.01) |
| Nov 5, 2023 | 5.22% (0.05224) | 92.16th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.52% (0.04525) | 91.19th | 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 (48)
- http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402 x_refsource_CONFIRM
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html vendor-advisoryx_refsource_APPLE
- http://secunia.com/advisories/34347 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/34594 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34617 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34622 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34628 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34630 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34637 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34640 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34734 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35074 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://security.gentoo.org/glsa/glsa-200904-09.xml vendor-advisoryx_refsource_GENTOO
- http://src.mit.edu/fisheye/browse/krb5/trunk/src/lib/gssapi/spnego/spnego_mech.c?r1=21875&r2=22084 x_refsource_CONFIRMExploit
- http://src.mit.edu/fisheye/changelog/krb5/?cs=22084 x_refsource_CONFIRMVendor Advisory
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1 vendor-advisoryx_refsource_SUNALERT
- http://support.apple.com/kb/HT3549 x_refsource_CONFIRM
- http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm x_refsource_CONFIRM
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html x_refsource_MISC
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html x_refsource_MISC
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt x_refsource_CONFIRM
- http://wiki.rpath.com/Advisories:rPSA-2009-0058 x_refsource_CONFIRM
- http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058 x_refsource_MISC
- http://www-01.ibm.com/support/docview.wss?uid=swg21396120 x_refsource_CONFIRM
- http://www.kb.cert.org/vuls/id/662091 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:082 vendor-advisoryx_refsource_MANDRIVA
- http://www.redhat.com/support/errata/RHSA-2009-0408.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/archive/1/502526/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/502546/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/34257 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1021867 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/usn-755-1 vendor-advisoryx_refsource_UBUNTU
- http://www.us-cert.gov/cas/techalerts/TA09-133A.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.vupen.com/english/advisories/2009/0847 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2009/0976 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1057 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1106 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1297 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/2248 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2009-0845 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=490634 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49448 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2009-0845
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10044 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6449 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2009-0845
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.html vendor-advisoryx_refsource_FEDORA
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 27, 2009
Updated Aug 7, 2024
Reserved Mar 6, 2009
Link CVE-2009-0845
CISA Vulnrichment
Updated n/a