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…

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.

Scores

EPSS (exploitation in 30 days)

5.6% · top 7.0% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• n/a

  • affected n/a

References (44)

• http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html (opens in a new tab)x_refsource_MISCx_transferred
• 20090407 MITKRB5-SA-2009-001: multiple vulnerabilities in SPNEGO, ASN.1 decoder [CVE-2009-0844 CVE-2009-0845 CVE-2009-0847] (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• VU#662091 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• 34257 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• ADV-2009-0847 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 34347 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://support.apple.com/kb/HT3549 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://src.mit.edu/fisheye/browse/krb5/trunk/src/lib/gssapi/spnego/spnego_mech.c?r1=21875&r2=22084 (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2009:0408 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 34637 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 34640 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 35074 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• MDVSA-2009:082 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 256728 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
• GLSA-200904-09 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html (opens in a new tab)x_refsource_MISCx_transferred
• ADV-2009-0976 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• APPLE-SA-2009-05-12 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• USN-755-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• 34630 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://www-01.ibm.com/support/docview.wss?uid=swg21396120 (opens in a new tab)x_refsource_CONFIRMx_transferred
• ADV-2009-1057 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
• 34617 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 34628 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 34734 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• kerberos-spnego-dos(49448) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• oval:org.mitre.oval:def:6449 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• ADV-2009-2248 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• TA09-133A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058 (opens in a new tab)x_refsource_MISCx_transferred
• ADV-2009-1297 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 34622 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402 (opens in a new tab)x_refsource_CONFIRMx_transferred
• FEDORA-2009-2852 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 1021867 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• FEDORA-2009-2834 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• http://wiki.rpath.com/Advisories:rPSA-2009-0058 (opens in a new tab)x_refsource_CONFIRMx_transferred
• oval:org.mitre.oval:def:10044 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• http://src.mit.edu/fisheye/changelog/krb5/?cs=22084 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 20090407 rPSA-2009-0058-1 krb5 krb5-server krb5-services krb5-test krb5-workstation (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 34594 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2009-1106 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2009-0845](https://trackcve.app/badge/CVE-2009-0845.svg)](https://trackcve.app/cve/CVE-2009-0845)

Record last updated 7 Aug 2024, 04:48 UTC.