{"schema":"threatline.record/2","record":{"id":"CVE-2021-4034","aliases":[],"summary":"Red Hat Polkit Out-of-Bounds Read and Write Vulnerability","details":"The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.","categories":["Identity & access"],"product":"Polkit","vendor":"Red Hat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-4034","source_modified_at":"2026-08-15T03:55:29.140Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"polkit","vendor":"n/a","versions":[{"version":"all","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.8,"severity":"High","kev":{"listed":true,"date_added":"2022-06-27","due_date":"2022-07-18","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.94921,"percentile":0.99863,"score_date":"2026-10-23"},"published_at":"2022-01-28T00:00:00.000Z","modified_at":"2026-08-15T03:55:29.140Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-4034","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-15T03:55:29.140Z"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2021_4034_pwnkit_lpe_pkexec.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2022-01-25"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/50689","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2022-01-27"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-4034","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Metasploit","Exploit-DB","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4034","source":"CISA KEV"},{"source":"CVE List","url":"https://access.redhat.com/security/vulnerabilities/RHSB-2022-001","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt","tags":["x_transferred"]},{"source":"CVE List","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2025869","tags":["x_transferred"]},{"source":"CVE List","url":"https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.suse.com/support/kb/doc/?id=000020564","tags":["x_transferred"]},{"source":"CVE List","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.starwindsoftware.com/security/sw-20220818-0001/","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.vicarius.io/vsociety/posts/pwnkit-pkexec-lpe-cve-2021-4034"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-4034","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2022-06-27T00:00:00+00:00"},"exploits":[{"source":"Metasploit","kind":"Exploit module","name":"Local Privilege Escalation in polkits pkexec","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2021_4034_pwnkit_lpe_pkexec.rb","date":"2022-01-25","added":"2026-04-22","check":true},{"source":"Exploit-DB","kind":"Local exploit","name":"PolicyKit-1 0.105-31 - Privilege Escalation","url":"https://www.exploit-db.com/exploits/50689","date":"2022-01-27","added":"2022-01-27","verified":false}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-15T03:55:29.140Z","content_hash":"abf0c0abf477b9a9c5029c3cf31b2e71878905565d59ecbec6ecc9f3ce60b1c8"}}