CVE-2009-4146 - Vulnerability Details - OpenCVE

Description

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.

Published: 2009-12-02

Score: 7.2 High

EPSS: 18.2% Moderate

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

OR	cpe:2.3:o:freebsd:freebsd:7.1:::::::*
	cpe:2.3:o:freebsd:freebsd:7.2:::::::*
	cpe:2.3:o:freebsd:freebsd:8.0:::::::*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.1817.

Key SSVC decision points have not yet been added.

References

Link	Providers
http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
http://people.freebsd.org/~cperciva/rtld.patch
http://secunia.com/advisories/37517
http://www.securityfocus.com/archive/1/508142/100/0/threaded
http://www.securityfocus.com/archive/1/508146/100/0/threaded
http://www.securityfocus.com/archive/1/508168/100/0/threaded
http://www.securityfocus.com/bid/37154
http://www.securitytracker.com/id?1023250

History

No history.

Subscriptions

Freebsd Freebsd

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2009-12-02T18:00:00.000Z

Updated: 2024-08-07T06:54:09.989Z

Reserved: 2009-12-01T00:00:00.000Z

Link: CVE-2009-4146

Vulnrichment

No data.

NVD

Status : Modified

Published: 2009-12-02T18:30:00.297

Modified: 2026-04-23T00:35:47.467

Link: CVE-2009-4146

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-264

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2009-11-30T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2019-05-22T02:06:03.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "37154", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/37154"}, {"name": "20091201 Upcoming FreeBSD Security Advisory", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "http://www.securityfocus.com/archive/1/508146/100/0/threaded"}, {"name": "37517", "tags": ["third-party-advisory", "x_refsource_SECUNIA"], "url": "http://secunia.com/advisories/37517"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://people.freebsd.org/~cperciva/rtld.patch"}, {"name": "20091130 ** FreeBSD local r00t zeroday", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "http://www.securityfocus.com/archive/1/508142/100/0/threaded"}, {"name": "1023250", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id?1023250"}, {"name": "20091201 Re: ** FreeBSD local r00t zeroday", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "http://www.securityfocus.com/archive/1/508168/100/0/threaded"}, {"tags": ["x_refsource_MISC"], "url": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2009-4146", "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 _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "37154", "refsource": "BID", "url": "http://www.securityfocus.com/bid/37154"}, {"name": "20091201 Upcoming FreeBSD Security Advisory", "refsource": "BUGTRAQ", "url": "http://www.securityfocus.com/archive/1/508146/100/0/threaded"}, {"name": "37517", "refsource": "SECUNIA", "url": "http://secunia.com/advisories/37517"}, {"name": "http://people.freebsd.org/~cperciva/rtld.patch", "refsource": "CONFIRM", "url": "http://people.freebsd.org/~cperciva/rtld.patch"}, {"name": "20091130 ** FreeBSD local r00t zeroday", "refsource": "BUGTRAQ", "url": "http://www.securityfocus.com/archive/1/508142/100/0/threaded"}, {"name": "1023250", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id?1023250"}, {"name": "20091201 Re: ** FreeBSD local r00t zeroday", "refsource": "BUGTRAQ", "url": "http://www.securityfocus.com/archive/1/508168/100/0/threaded"}, {"name": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html", "refsource": "MISC", "url": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-07T06:54:09.989Z"}, "title": "CVE Program Container", "references": [{"name": "37154", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/37154"}, {"name": "20091201 Upcoming FreeBSD Security Advisory", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "http://www.securityfocus.com/archive/1/508146/100/0/threaded"}, {"name": "37517", "tags": ["third-party-advisory", "x_refsource_SECUNIA", "x_transferred"], "url": "http://secunia.com/advisories/37517"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://people.freebsd.org/~cperciva/rtld.patch"}, {"name": "20091130 ** FreeBSD local r00t zeroday", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "http://www.securityfocus.com/archive/1/508142/100/0/threaded"}, {"name": "1023250", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id?1023250"}, {"name": "20091201 Re: ** FreeBSD local r00t zeroday", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "http://www.securityfocus.com/archive/1/508168/100/0/threaded"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2009-4146", "datePublished": "2009-12-02T18:00:00.000Z", "dateReserved": "2009-12-01T00:00:00.000Z", "dateUpdated": "2024-08-07T06:54:09.989Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:freebsd:freebsd:7.1:*:*:*:*:*:*:*", "matchCriteriaId": "803EFA9F-B7CB-4511-B1C1-381170CA9A23", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:7.2:*:*:*:*:*:*:*", "matchCriteriaId": "F948527C-A01E-4315-80B6-47FACE18A34F", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "3CF1F9EF-01AF-4708-AE02-765360AF3D66", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147."}, {"lang": "es", "value": "La funci\u00f3n _rtld en el Run-Time Link-Editor (rtld) de libexec/rtld-elf/rtld.c de FreeBSD v7.1, v7.2 y v8.0, no limpia la variable de entorno LD_PRELOAD, esto permite a usuarios locales aumentar sus privilegios al ejecutar el programa setuid o setguid con la variable LD_PRELOAD modificada para que contenga una ruta de b\u00fasqueda no confiable que apunte a una biblioteca de un Troyano. Se trata de una vulnerabilidad diferente de CVE-2009-4147."}], "id": "CVE-2009-4146", "lastModified": "2026-04-23T00:35:47.467", "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": "2009-12-02T18:30:00.297", "references": [{"source": "cve@mitre.org", "url": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "tags": ["Exploit"], "url": "http://people.freebsd.org/~cperciva/rtld.patch"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/37517"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/archive/1/508142/100/0/threaded"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/archive/1/508146/100/0/threaded"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/archive/1/508168/100/0/threaded"}, {"source": "cve@mitre.org", "tags": ["Exploit"], "url": "http://www.securityfocus.com/bid/37154"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id?1023250"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://people.freebsd.org/~cperciva/rtld.patch"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/37517"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/archive/1/508142/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/archive/1/508146/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/archive/1/508168/100/0/threaded"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://www.securityfocus.com/bid/37154"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id?1023250"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-264"}], "source": "nvd@nist.gov", "type": "Primary"}]}