CVE-2010-2023 (GCVE-0-2010-2023)
Vulnerability from cvelistv5 – Published: 2010-06-07 14:00 – Updated: 2024-08-07 02:17
VLAI
EPSS
VEX
Summary
transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
18 references
Date Public
2010-05-24 00:00
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],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user\u0027s file."
},
{
"lang": "es",
"value": "transports/appendfile.c en Exim antes de v4.72, cuando se usa un directorio de correo con permisos de escritura para todos y sticky-bit activado, no verifica el campo de st_nlink de los ficheros de buz\u00f3n de correo, que permite a usuarios locales causar una denegaci\u00f3n de servicio o posiblemente obtener privilegios mediante la creaci\u00f3n de un v\u00ednculo f\u00edsico a un archivo de otro usuario."
}
],
"id": "CVE-2010-2023",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.4,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2010-06-07T17:12:48.247",
"references": [
{
"source": "cve@mitre.org",
"url": "http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html"
},
{
"source": "cve@mitre.org",
"url": "http://bugs.exim.org/show_bug.cgi?id=988"
},
{
"source": "cve@mitre.org",
"url": "http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html"
},
{
"source": "cve@mitre.org",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html"
},
{
"source": "cve@mitre.org",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html"
},
{
"source": "cve@mitre.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/40019"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/40123"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/43243"
},
{
"source": "cve@mitre.org",
"url": "http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup\u0026pathrev=exim-4_72_RC2"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24\u0026r2=1.25"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/archive/1/511653/100/0/threaded"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/bid/40451"
},
{
"source": "cve@mitre.org",
"url": "http://www.ubuntu.com/usn/USN-1060-1"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2010/1402"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2011/0364"
},
{
"source": "cve@mitre.org",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=600093"
},
{
"source": "cve@mitre.org",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/59043"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://archives.neohapsis.com/archives/fulldisclosure/2010-06/0079.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://bugs.exim.org/show_bug.cgi?id=988"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.exim.org/lurker/message/20100524.175925.9a69f755.en.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042587.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2010-June/042613.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/40019"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/40123"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/43243"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup\u0026pathrev=exim-4_72_RC2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24\u0026r2=1.25"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/511653/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/40451"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-1060-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.vupen.com/english/advisories/2010/1402"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.vupen.com/english/advisories/2011/0364"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=600093"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/59043"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T13:05:50+00:00",
"cve": "CVE-2010-2023",
"id": "CVE-2010-2023",
"initial_release_date": "2010-06-03T00:00:00+00:00",
"product_status:known_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "exim: hard-link following vulnerability in mailbox handling",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2010/cve-2010-2023.json",
"version": "3"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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