{"schema":"threatline.record/2","record":{"id":"CVE-2023-20109","aliases":[],"summary":"Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability","details":"Cisco IOS and IOS XE contain an out-of-bounds write vulnerability in the Group Encrypted Transport VPN (GET VPN) feature that could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute malicious code or cause a device to crash.","categories":["Operating systems"],"product":"IOS and IOS XE","vendor":"Cisco","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-20109","source_modified_at":"2025-10-21T23:05:36.370Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"IOS","vendor":"Cisco","versions":[{"version":"12.4(24)T","status":"affected"},{"version":"12.4(24)T3","status":"affected"},{"version":"12.4(22)T1","status":"affected"},{"version":"12.4(24)T5","status":"affected"},{"version":"12.4(24)T4","status":"affected"},{"version":"12.4(22)T","status":"affected"},{"version":"12.4(24)T8","status":"affected"},{"version":"12.4(24)T2","status":"affected"},{"version":"12.4(22)T5","status":"affected"},{"version":"12.4(22)T4","status":"affected"},{"version":"12.4(24)T1","status":"affected"},{"version":"12.4(24)T7","status":"affected"},{"version":"12.4(22)T3","status":"affected"},{"version":"12.4(24)T6","status":"affected"},{"version":"12.4(22)T2","status":"affected"},{"version":"12.4(24)T4a","status":"affected"},{"version":"12.4(24)T4b","status":"affected"},{"version":"12.4(24)T3e","status":"affected"},{"version":"12.4(24)T4c","status":"affected"},{"version":"12.4(24)T4d","status":"affected"},{"version":"12.4(24)T4e","status":"affected"},{"version":"12.4(24)T3f","status":"affected"},{"version":"12.4(24)T4f","status":"affected"},{"version":"12.4(24)T4l","status":"affected"},{"version":"12.4(24)MD1","status":"affected"},{"version":"12.4(24)MD","status":"affected"},{"version":"12.4(24)MD3","status":"affected"},{"version":"12.4(24)MD2","status":"affected"},{"version":"12.4(22)MD1","status":"affected"},{"version":"12.4(22)MD2","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-20109","source_modified_at":"2025-10-21T23:05:36.370Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cisco IOS XE Software","vendor":"Cisco","versions":[{"version":"3.7.0S","status":"affected"},{"version":"3.7.1S","status":"affected"},{"version":"3.7.2S","status":"affected"},{"version":"3.7.3S","status":"affected"},{"version":"3.7.4S","status":"affected"},{"version":"3.7.5S","status":"affected"},{"version":"3.7.6S","status":"affected"},{"version":"3.7.7S","status":"affected"},{"version":"3.7.4aS","status":"affected"},{"version":"3.7.2tS","status":"affected"},{"version":"3.7.0bS","status":"affected"},{"version":"3.7.1aS","status":"affected"},{"version":"3.3.0SG","status":"affected"},{"version":"3.3.2SG","status":"affected"},{"version":"3.3.1SG","status":"affected"},{"version":"3.8.0S","status":"affected"},{"version":"3.8.1S","status":"affected"},{"version":"3.8.2S","status":"affected"},{"version":"3.9.1S","status":"affected"},{"version":"3.9.0S","status":"affected"},{"version":"3.9.2S","status":"affected"},{"version":"3.9.1aS","status":"affected"},{"version":"3.9.0aS","status":"affected"},{"version":"3.4.0SG","status":"affected"},{"version":"3.4.2SG","status":"affected"},{"version":"3.4.1SG","status":"affected"},{"version":"3.4.3SG","status":"affected"},{"version":"3.4.4SG","status":"affected"},{"version":"3.4.5SG","status":"affected"},{"version":"3.4.6SG","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.6,"severity":"Medium","kev":{"listed":true,"date_added":"2023-10-10","due_date":"2023-10-31","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.02484,"percentile":0.84483,"score_date":"2026-10-23"},"published_at":"2023-09-27T17:23:21.589Z","modified_at":"2025-10-21T23:05:36.370Z","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-2023-20109","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:05:36.370Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2023-20109","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-getvpn-rce-g8qR68sx","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20109","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20109","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2024-10-23T18:52:07.119633Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:05:36.370Z","content_hash":"a174885c8ad530cdbe241c47501a5c81e07023322a5570efb46891fe71881b09"}}