CVE-2019-19726

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2019-19726", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-05T02:25:12.567Z", "dateReserved": "2019-12-11T00:00:00.000Z", "datePublished": "2019-12-12T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-10-06T16:06:13.389Z"}, "descriptions": [{"lang": "en", "value": "OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://www.openbsd.org/errata66.html"}, {"url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"}, {"name": "20191212 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)", "tags": ["mailing-list"], "url": "https://seclists.org/bugtraq/2019/Dec/25"}, {"url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"}, {"name": "20191213 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2019/Dec/31"}, {"url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"}, {"name": "[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"}, {"name": "20231005 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2023/Oct/11"}, {"url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T02:25:12.567Z"}, "title": "CVE Program Container", "references": [{"url": "https://www.openbsd.org/errata66.html", "tags": ["x_transferred"]}, {"url": "https://www.openwall.com/lists/oss-security/2019/12/11/9", "tags": ["x_transferred"]}, {"name": "20191212 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)", "tags": ["mailing-list", "x_transferred"], "url": "https://seclists.org/bugtraq/2019/Dec/25"}, {"url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"name": "20191213 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2019/Dec/31"}, {"url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"name": "[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"}, {"name": "20231005 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2023/Oct/11"}, {"url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html", "tags": ["x_transferred"]}]}]}}

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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:*:*:*:*:*:*:*:*", "matchCriteriaId": "4586CE9D-A387-4255-8777-F1461913AD2B", "versionEndIncluding": "6.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root."}, {"lang": "es", "value": "OpenBSD versiones hasta 6.6, permite a usuarios locales escalar a root porque una comprobaci\u00f3n de LD_LIBRARY_PATH en los programas setuid puede ser vencida estableciendo un l\u00edmite de recursos de RLIMIT_DATA muy peque\u00f1o. Al ejecutar chpass o passwd (que son root de setuid), en la funci\u00f3n _dl_setup_env en el archivo ld.so intenta eliminar LD_LIBRARY_PATH del entorno, pero presenta un fallo cuando no puede asignar memoria. Por lo tanto, el atacante es capaz de ejecutar su propio c\u00f3digo de biblioteca como root."}], "id": "CVE-2019-19726", "lastModified": "2026-06-17T02:27:08.850", "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": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-12-12T01:15:10.823", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2019/Dec/31"}, {"source": "cve@mitre.org", "url": "http://seclists.org/fulldisclosure/2023/Oct/11"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://seclists.org/bugtraq/2019/Dec/25"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.openbsd.org/errata66.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2019/Dec/31"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2023/Oct/11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2023/10/03/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://seclists.org/bugtraq/2019/Dec/25"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.openbsd.org/errata66.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2019/12/11/9"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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