CVE-2006-6164

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2006-11-19T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The _dl_unsetenv function in loader.c in the ELF ld.so in OpenBSD 3.9 and 4.0 does not properly remove duplicate environment variables, which allows local users to pass dangerous variables such as LD_PRELOAD to loading processes, which might be leveraged to gain privileges."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-10-17T20:57:01.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "[3.9] 016: SECURITY FIX: November 19, 2006", "tags": ["vendor-advisory", "x_refsource_OPENBSD"], "url": "http://www.openbsd.org/errata39.html#ldso"}, {"tags": ["x_refsource_MISC"], "url": "http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/"}, {"name": "20061123 Re: Lack of environment sanitization in the FreeBSD, OpenBSD, NetBSD dynamic loaders.", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "http://www.securityfocus.com/archive/1/452428/100/0/threaded"}, {"name": "22993", "tags": ["third-party-advisory", "x_refsource_SECUNIA"], "url": "http://secunia.com/advisories/22993"}, {"name": "21188", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/21188"}, {"name": "[4.0] 005: SECURITY FIX: November 19, 2006", "tags": ["vendor-advisory", "x_refsource_OPENBSD"], "url": "http://www.openbsd.org/errata.html#ldso"}, {"name": "20061122 Lack of environment sanitization in the FreeBSD, OpenBSD, NetBSD dynamic loaders.", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "http://www.securityfocus.com/archive/1/452371/100/0/threaded"}, {"name": "1017253", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://securitytracker.com/id?1017253"}, {"name": "openbsd-elf-privilege-escalation(30441)", "tags": ["vdb-entry", "x_refsource_XF"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/30441"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2006-6164", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The _dl_unsetenv function in loader.c in the ELF ld.so in OpenBSD 3.9 and 4.0 does not properly remove duplicate environment variables, which allows local users to pass dangerous variables such as LD_PRELOAD to loading processes, which might be leveraged to gain privileges."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "[3.9] 016: SECURITY FIX: November 19, 2006", "refsource": "OPENBSD", "url": "http://www.openbsd.org/errata39.html#ldso"}, {"name": "http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/", "refsource": "MISC", "url": "http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/"}, {"name": "20061123 Re: Lack of environment sanitization in the FreeBSD, OpenBSD, NetBSD dynamic loaders.", "refsource": "BUGTRAQ", "url": "http://www.securityfocus.com/archive/1/452428/100/0/threaded"}, {"name": "22993", "refsource": "SECUNIA", "url": "http://secunia.com/advisories/22993"}, {"name": "21188", "refsource": "BID", "url": "http://www.securityfocus.com/bid/21188"}, {"name": "[4.0] 005: SECURITY FIX: November 19, 2006", "refsource": "OPENBSD", "url": "http://www.openbsd.org/errata.html#ldso"}, {"name": "20061122 Lack of environment sanitization in the FreeBSD, OpenBSD, NetBSD dynamic 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["vdb-entry", "x_refsource_XF", "x_transferred"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/30441"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2006-6164", "datePublished": "2006-11-29T01:00:00.000Z", "dateReserved": "2006-11-28T00:00:00.000Z", "dateUpdated": "2024-08-07T20:19:34.560Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:openbsd:openbsd:3.9:*:*:*:*:*:*:*", "matchCriteriaId": "F5BB6C5D-4C43-4BB8-B1CE-A70BBE650CA1", "vulnerable": true}, {"criteria": "cpe:2.3:o:openbsd:openbsd:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "CC77812C-D84E-493E-9D21-1BA6C2129E70", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The _dl_unsetenv function in loader.c in the ELF ld.so in OpenBSD 3.9 and 4.0 does not properly remove duplicate environment variables, which allows local users to pass dangerous variables such as LD_PRELOAD to loading processes, which might be leveraged to gain privileges."}, {"lang": "es", "value": "La funci\u00f3n _dl_unsetenv en loader.c en el ELF ld.so en OpenBSD 3.9 y 4.0 no borra adecuadamente variables de entorno duplicadas, lo cual permite a usuarios locales pasar variables peligrosas como LD_PRELOAD a procesos de carga, lo cual puede ser utilizado para obtener privilegios."}], "id": "CVE-2006-6164", "lastModified": "2026-06-16T22:32:35.703", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": true, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2006-11-29T01:28:00.000", "references": [{"source": "cve@mitre.org", "url": "http://secunia.com/advisories/22993"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://securitytracker.com/id?1017253"}, {"source": "cve@mitre.org", "url": "http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://www.openbsd.org/errata.html#ldso"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://www.openbsd.org/errata39.html#ldso"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/archive/1/452371/100/0/threaded"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/archive/1/452428/100/0/threaded"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/21188"}, {"source": "cve@mitre.org", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/30441"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://secunia.com/advisories/22993"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://securitytracker.com/id?1017253"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://www.openbsd.org/errata.html#ldso"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://www.openbsd.org/errata39.html#ldso"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/archive/1/452371/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/archive/1/452428/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/21188"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/30441"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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