CVE-2021-4034

{"id": "CVE-2021-4034", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2022-01-28T20:15:12.193", "references": [{"url": "http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "secalert@redhat.com"}, {"url": "http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html", "tags": ["Third Party Advisory", "VDB Entry"], "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/vulnerabilities/RHSB-2022-001", "tags": ["Mitigation", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2025869", "tags": ["Issue Tracking", "Patch"], "source": "secalert@redhat.com"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683", "tags": ["Patch"], "source": "secalert@redhat.com"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": 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["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.starwindsoftware.com/security/sw-20220818-0001/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.suse.com/support/kb/doc/?id=000020564", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.vicarius.io/vsociety/posts/pwnkit-pkexec-lpe-cve-2021-4034", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-4034", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad de escalada de privilegios local en la utilidad pkexec de polkit. La aplicaci\u00f3n pkexec es una herramienta setuid dise\u00f1ada para permitir a usuarios sin privilegios ejecutar comandos como usuarios privilegiados de acuerdo con pol\u00edticas predefinidas. La versi\u00f3n actual de pkexec no maneja correctamente el recuento de par\u00e1metros de llamada y termina intentando ejecutar variables de entorno como comandos. Un atacante puede aprovechar esto creando variables de entorno de tal manera que induzcan a pkexec a ejecutar c\u00f3digo arbitrario. Cuando se ejecuta con \u00e9xito, el ataque puede provocar una escalada de privilegios locales otorgando a los usuarios sin privilegios derechos administrativos en la m\u00e1quina de destino."}], "lastModified": "2025-11-06T14:50:26.470", "cisaActionDue": "2022-07-18", "cisaExploitAdd": "2022-06-27", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F01D94C9-1E04-413B-8636-1AAC6D9E84D6", "versionEndExcluding": "121"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:enterprise_linux_server_update_services_for_sap_solutions:7.6:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CB70A2F8-EAB3-4898-9353-F679FF721C82"}, {"criteria": "cpe:2.3:a:redhat:enterprise_linux_server_update_services_for_sap_solutions:7.7:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB3AC848-C2D0-4878-8619-F5815173555D"}, {"criteria": 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