CVE-2009-0845 (GCVE-0-2009-0845)
Vulnerability from cvelistv5 – Published: 2009-03-27 16:00 – Updated: 2024-08-07 04:48
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
44 references
Date Public
2009-03-13 00:00
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"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2009-0845",
"datePublished": "2009-03-27T16:00:00.000Z",
"dateReserved": "2009-03-06T00:00:00.000Z",
"dateUpdated": "2024-08-07T04:48:52.589Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2009-0845",
"date": "2026-09-14",
"epss": "0.05628",
"percentile": "0.92507"
},
"fkie_nvd": {
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"descriptions": "[{\"lang\": \"en\", \"value\": \"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.\"}, {\"lang\": \"es\", \"value\": \"La funci\\u00f3n spnego_gss_accept_sec_context en lib/gssapi/spnego/spnego_mech.c en MIT Kerberos 5 (conocido como krb5) v.1.6.3, cuando se utiliza SPNEGO, permite a atacantes remotos provocar una denegaci\\u00f3n de servicio (referencia a puntero nulo y ca\\u00edda de la aplicaci\\u00f3n) mediante datos \\\"ContextFlags\\\" inv\\u00e1lidos en el campo \\\"reqFlags\\\" en el token negTokenInit.\"}]",
"id": "CVE-2009-0845",
"lastModified": "2024-11-21T01:01:02.737",
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"published": "2009-03-27T16:30:02.157",
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"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-20\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2009-0845\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2009-03-27T16:30:02.157\",\"lastModified\":\"2026-04-23T00:35:47.467\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"La funci\u00f3n spnego_gss_accept_sec_context en lib/gssapi/spnego/spnego_mech.c en MIT Kerberos 5 (conocido como krb5) v.1.6.3, cuando se utiliza SPNEGO, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (referencia a puntero nulo y ca\u00edda de la aplicaci\u00f3n) mediante datos \\\"ContextFlags\\\" inv\u00e1lidos en el campo \\\"reqFlags\\\" en el token negTokenInit.\"}],\"metrics\":{\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos:5-1.6.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"032730AE-1E53-4CA2-96FD-AD60CD27F3CA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.5:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DD315AE-868B-4061-BF01-CDBF59B02499\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.5.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B639DD5F-71C7-4D9B-BA5C-51CAF64140B6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.5.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2B904DCE-D59F-45C7-A814-DE42CF02792D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.5.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9957FE9E-1E89-4C27-852C-44F866A1834E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.6:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2C382DAA-68D2-4DD9-BE29-8EEB0BAF1A7A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.6.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"73BB258E-51CF-4D12-836B-BCEA587A3F5F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mit:kerberos_5:1.6.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F81DE01C-BA3B-40B4-BD85-17692F0AF8A8\"}]}]}],\"references\":[{\"url\":\"http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest\u0026pass=guest\u0026id=6402\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.apple.com/archives/security-announce/2009/May/msg00002.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/34347\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor 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"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2025-11-21T13:12:34+00:00",
"cve": "CVE-2009-0845",
"id": "CVE-2009-0845",
"initial_release_date": "2009-03-13T00:00:00+00:00",
"product_status:fixed": "96",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "krb5: NULL pointer dereference in GSSAPI SPNEGO (MITKRB5-SA-2009-001)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2009/cve-2009-0845.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-23T17:16:02Z",
"cve": "CVE-2009-0845",
"id": "CVE-2009-0845",
"initial_release_date": "2023-02-15T06:04:49Z",
"product_status:recommended": "281",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2009-0845",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2009-0845.json",
"version": "20"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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