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CVE-2010-2023 (GCVE-0-2010-2023)

Vulnerability from cvelistv5 – Published: 2010-06-07 14:00 – Updated: 2024-08-07 02:17
VLAI
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
URL Tags
http://archives.neohapsis.com/archives/fulldisclo… mailing-listx_refsource_FULLDISC
http://www.securityfocus.com/bid/40451 vdb-entryx_refsource_BID
http://www.vupen.com/english/advisories/2010/1402 vdb-entryx_refsource_VUPEN
http://www.vupen.com/english/advisories/2011/0364 vdb-entryx_refsource_VUPEN
http://secunia.com/advisories/43243 third-party-advisoryx_refsource_SECUNIA
http://bugs.exim.org/show_bug.cgi?id=988 x_refsource_CONFIRM
http://vcs.exim.org/viewvc/exim/exim-src/src/tran… x_refsource_CONFIRM
http://secunia.com/advisories/40019 third-party-advisoryx_refsource_SECUNIA
http://lists.exim.org/lurker/message/20100524.175… mailing-listx_refsource_MLIST
http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/… x_refsource_CONFIRM
http://secunia.com/advisories/40123 third-party-advisoryx_refsource_SECUNIA
http://www.securityfocus.com/archive/1/511653/100… mailing-listx_refsource_BUGTRAQ
https://bugzilla.redhat.com/show_bug.cgi?id=600093 x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.ubuntu.com/usn/USN-1060-1 vendor-advisoryx_refsource_UBUNTU
https://exchange.xforce.ibmcloud.com/vulnerabilit… vdb-entryx_refsource_XF
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
Date Public
2010-05-24 00:00
Show details on NVD website
To clipboard 

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      "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": "2024-11-21T01:15:43.950",
      "metrics": "{\"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:M/Au:N/C:P/I:P/A:P\", \"baseScore\": 4.4, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 3.4, \"impactScore\": 6.4, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2010-06-07T17:12:48.247",
      "references": "[{\"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\"}, {\"url\": \"http://secunia.com/advisories/40019\", \"source\": \"cve@mitre.org\", \"tags\": [\"Vendor Advisory\"]}, {\"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\"}, {\"url\": \"http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24\u0026r2=1.25\", \"source\": \"cve@mitre.org\", \"tags\": [\"Patch\"]}, {\"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\": \"cve@mitre.org\"}, {\"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\"}, {\"url\": \"http://secunia.com/advisories/40019\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"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\"}, {\"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\", \"tags\": [\"Patch\"]}, {\"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\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-362\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2010-2023\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2010-06-07T17:12:48.247\",\"lastModified\":\"2026-04-29T01:13:23.040\",\"vulnStatus\":\"Modified\",\"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.\"}],\"metrics\":{\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:P/I:P/A:P\",\"baseScore\":4.4,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.4,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"4.71\",\"matchCriteriaId\":\"3F612EF3-5909-4AA7-9041-02C193E447C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0EC43E6B-2DA9-496E-BAD2-04FF4C3A53FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.20:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"04C4B45D-A0AC-42B3-99D7-91F7B8D15B69\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.21:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"ED822CDF-C94B-4A16-BEEB-FECE51CBB744\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.22:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B52A1ECA-44CC-4DDE-B1AD-25AE27605317\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.23:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3E7D5D6F-8FDB-4AC2-A4D9-16E632AC8EAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.24:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A4FEC2B4-BD68-428E-91BC-BC85F72E3BE8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.30:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"23EEBB47-2495-4FDB-9A55-415DA69392E8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.31:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D4A8E154-32CC-4665-82A0-1DE7A51B2435\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.32:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4B594190-DF8F-45AE-8579-BD7B4568606F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.33:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"BD2D8712-4DF9-4A73-93A7-7719C3502E18\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.34:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2D9DF054-4CBF-4BA7-9A42-5627DC4B6A68\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.40:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B13E6533-BEB9-4082-9063-7E3CCBF4C36C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.41:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"879B9641-3245-4CF7-912A-FD21372F46F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.42:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A91CA841-BBCA-4EF9-BC00-478A18797941\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.43:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EEA3F58C-3EF2-48B9-9171-7EFE72B1A3DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.44:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AFB37C45-54E7-4E91-8E6D-0A3E764E1702\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.50:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"31CBE3C0-4918-4FA6-B1E7-6336913EF8D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.51:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FC45BCE0-F190-4050-8B3B-869D0C1033AE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.52:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6FD0E5A4-3FCB-46C1-A709-CA15D96FA9B0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.53:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3335C80-97AE-42DB-B125-0D3FA57D8317\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.54:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0F83560A-BDD7-456D-846C-D1DAF5C9DA64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.60:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"22B9FD06-13E3-47CA-AB67-691DC3A9C330\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.61:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EE2A81F2-3E53-4A31-BCC6-BDC0E1B62CC8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.62:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2A03C071-87BF-4D5E-ABED-472ABAEFAC71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.63:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D1D96C53-989C-42C8-9E71-A206B78ED55A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.64:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"30190EAB-7140-4E0A-B7A5-8FA8BD0749C9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.65:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0BD63C5-C916-4D7D-AE81-7B9676FC0951\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.66:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CCD8FE2F-8D53-407A-BB83-EB7725456D71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:4.67:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"162F5CB4-1931-4236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    "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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2025-03-16T14:38:19Z",
      "cve": "CVE-2010-2023",
      "id": "CVE-2010-2023",
      "initial_release_date": "2023-02-15T05:59:01Z",
      "product_status:recommended": "3",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2010-2023",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2010-2023.json",
      "version": "5"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.