{"id":"CVE-2024-20331","state":"PUBLISHED","title":"Cisco Adaptive Security Appliance and Firepower Threat Defense Software VPN Authentication DoS Vulnerability","description":"A vulnerability in the session authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to prevent users from authenticating.\r\n\r\nThis vulnerability is due to insufficient entropy in the authentication process. An attacker could exploit this vulnerability by determining the handle of an authenticating user and using it to terminate their authentication session. A successful exploit could allow the attacker to force a user to restart the authentication process, preventing a legitimate user from establishing remote access VPN sessions.","publishedAt":"2024-10-23T17:08:53.583Z","updatedAt":"2024-10-24T17:48:23.908Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco Adaptive Security Appliance (ASA) Software","Cisco Cisco Firepower Threat Defense Software"],"affected":[{"vendor":"Cisco","product":"Cisco Adaptive Security Appliance (ASA) Software","defaultStatus":"unknown","versions":[{"version":"9.12.3","status":"affected"},{"version":"9.8.3","status":"affected"},{"version":"9.12.1","status":"affected"},{"version":"9.8.1","status":"affected"},{"version":"9.12.2","status":"affected"},{"version":"9.8.2.45","status":"affected"},{"version":"9.8.2","status":"affected"},{"version":"9.8.4","status":"affected"},{"version":"9.14.1","status":"affected"},{"version":"9.12.4","status":"affected"},{"version":"9.8.2.26","status":"affected"},{"version":"9.8.2.24","status":"affected"},{"version":"9.8.2.15","status":"affected"},{"version":"9.8.2.14","status":"affected"},{"version":"9.8.2.35","status":"affected"},{"version":"9.8.2.20","status":"affected"},{"version":"9.8.2.8","status":"affected"},{"version":"9.8.2.17","status":"affected"},{"version":"9.8.2.28","status":"affected"},{"version":"9.8.2.33","status":"affected"},{"version":"9.8.2.38","status":"affected"},{"version":"9.8.4.25","status":"affected"},{"version":"9.12.3.2","status":"affected"},{"version":"9.12.3.7","status":"affected"},{"version":"9.8.3.18","status":"affected"},{"version":"9.8.3.14","status":"affected"},{"version":"9.8.4.15","status":"affected"},{"version":"9.8.4.8","status":"affected"},{"version":"9.8.1.7","status":"affected"},{"version":"9.8.3.29","status":"affected"},{"version":"9.14.1.10","status":"affected"},{"version":"9.12.2.5","status":"affected"},{"version":"9.8.4.22","status":"affected"},{"version":"9.12.3.12","status":"affected"},{"version":"9.8.4.7","status":"affected"},{"version":"9.8.4.17","status":"affected"},{"version":"9.8.3.16","status":"affected"},{"version":"9.8.4.20","status":"affected"},{"version":"9.8.3.11","status":"affected"},{"version":"9.12.1.3","status":"affected"},{"version":"9.8.4.3","status":"affected"},{"version":"9.12.2.4","status":"affected"},{"version":"9.8.4.12","status":"affected"},{"version":"9.12.1.2","status":"affected"},{"version":"9.8.3.26","status":"affected"},{"version":"9.8.1.5","status":"affected"},{"version":"9.12.2.9","status":"affected"},{"version":"9.12.3.9","status":"affected"},{"version":"9.8.3.21","status":"affected"},{"version":"9.8.4.10","status":"affected"},{"version":"9.12.2.1","status":"affected"},{"version":"9.12.4.2","status":"affected"},{"version":"9.14.1.6","status":"affected"},{"version":"9.8.3.8","status":"affected"},{"version":"9.14.1.15","status":"affected"},{"version":"9.14.1.19","status":"affected"},{"version":"9.8.4.26","status":"affected"},{"version":"9.12.4.4","status":"affected"},{"version":"9.14.1.30","status":"affected"},{"version":"9.8.4.29","status":"affected"},{"version":"9.12.4.7","status":"affected"},{"version":"9.15.1","status":"affected"},{"version":"9.14.2","status":"affected"},{"version":"9.12.4.8","status":"affected"},{"version":"9.8.4.32","status":"affected"},{"version":"9.12.4.10","status":"affected"},{"version":"9.14.2.4","status":"affected"},{"version":"9.15.1.7","status":"affected"},{"version":"9.14.2.8","status":"affected"},{"version":"9.12.4.13","status":"affected"},{"version":"9.8.4.33","status":"affected"},{"version":"9.15.1.10","status":"affected"},{"version":"9.14.2.13","status":"affected"},{"version":"9.8.4.34","status":"affected"},{"version":"9.12.4.18","status":"affected"},{"version":"9.15.1.15","status":"affected"},{"version":"9.8.4.35","status":"affected"},{"version":"9.14.2.15","status":"affected"},{"version":"9.12.4.24","status":"affected"},{"version":"9.16.1","status":"affected"},{"version":"9.15.1.16","status":"affected"},{"version":"9.8.4.39","status":"affected"},{"version":"9.14.3","status":"affected"},{"version":"9.12.4.26","status":"affected"},{"version":"9.16.1.28","status":"affected"},{"version":"9.14.3.1","status":"affected"},{"version":"9.12.4.29","status":"affected"},{"version":"9.14.3.9","status":"affected"},{"version":"9.16.2","status":"affected"},{"version":"9.12.4.30","status":"affected"},{"version":"9.16.2.3","status":"affected"},{"version":"9.8.4.40","status":"affected"},{"version":"9.14.3.11","status":"affected"},{"version":"9.15.1.17","status":"affected"},{"version":"9.12.4.35","status":"affected"},{"version":"9.8.4.41","status":"affected"},{"version":"9.15.1.1","status":"affected"},{"version":"9.14.3.13","status":"affected"},{"version":"9.16.2.7","status":"affected"},{"version":"9.12.4.37","status":"affected"},{"version":"9.14.3.15","status":"affected"},{"version":"9.17.1","status":"affected"},{"version":"9.16.2.11","status":"affected"},{"version":"9.14.3.18","status":"affected"},{"version":"9.16.2.13","status":"affected"},{"version":"9.12.4.39","status":"affected"},{"version":"9.12.4.38","status":"affected"},{"version":"9.8.4.43","status":"affected"},{"version":"9.14.4","status":"affected"},{"version":"9.16.2.14","status":"affected"},{"version":"9.17.1.7","status":"affected"},{"version":"9.12.4.40","status":"affected"},{"version":"9.15.1.21","status":"affected"},{"version":"9.16.3.3","status":"affected"},{"version":"9.14.4.6","status":"affected"},{"version":"9.16.3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Firepower Threat Defense 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Adaptive Security Appliance and Firepower Threat Defense Software VPN Authentication DoS Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the session authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to prevent users from authenticating.\r\n\r\nThis vulnerability is due to insufficient entropy in the authentication process. An attacker could exploit this vulnerability by determining the handle of an authenticating user and using it to terminate their authentication session. A successful exploit could allow the attacker to force a user to restart the authentication process, preventing a legitimate user from establishing remote access VPN sessions."}],"affected":[{"vendor":"Cisco","product":"Cisco Adaptive Security Appliance (ASA) Software","defaultStatus":"unknown","versions":[{"version":"9.12.3","status":"affected"},{"version":"9.8.3","status":"affected"},{"version":"9.12.1","status":"affected"},{"version":"9.8.1","status":"affected"},{"version":"9.12.2","status":"affected"},{"version":"9.8.2.45","status":"affected"},{"version":"9.8.2","status":"affected"},{"version":"9.8.4","status":"affected"},{"version":"9.14.1","status":"affected"},{"version":"9.12.4","status":"affected"},{"version":"9.8.2.26","status":"affected"},{"version":"9.8.2.24","status":"affected"},{"version":"9.8.2.15","status":"affected"},{"version":"9.8.2.14","status":"affected"},{"version":"9.8.2.35","status":"affected"},{"version":"9.8.2.20","status":"affected"},{"version":"9.8.2.8","status":"affected"},{"version":"9.8.2.17","status":"affected"},{"version":"9.8.2.28","status":"affected"},{"version":"9.8.2.33","status":"affected"},{"version":"9.8.2.38","status":"affected"},{"version":"9.8.4.25","status":"affected"},{"version":"9.12.3.2","status":"affected"},{"version":"9.12.3.7","status":"affected"},{"version":"9.8.3.18","status":"affected"},{"version":"9.8.3.14","status":"affected"},{"version":"9.8.4.15","status":"affected"},{"version":"9.8.4.8","status":"affected"},{"version":"9.8.1.7","status":"affected"},{"version":"9.8.3.29","status":"affected"},{"version":"9.14.1.10","status":"affected"},{"version":"9.12.2.5","status":"affected"},{"version":"9.8.4.22","status":"affected"},{"version":"9.12.3.12","status":"affected"},{"version":"9.8.4.7","status":"affected"},{"version":"9.8.4.17","status":"affected"},{"version":"9.8.3.16","status":"affected"},{"version":"9.8.4.20","status":"affected"},{"version":"9.8.3.11","status":"affected"},{"version":"9.12.1.3","status":"affected"},{"version":"9.8.4.3","status":"affected"},{"version":"9.12.2.4","status":"affected"},{"version":"9.8.4.12","status":"affected"},{"version":"9.12.1.2","status":"affected"},{"version":"9.8.3.26","status":"affected"},{"version":"9.8.1.5","status":"affected"},{"version":"9.12.2.9","status":"affected"},{"version":"9.12.3.9","status":"affected"},{"version":"9.8.3.21","status":"affected"},{"version":"9.8.4.10","status":"affected"},{"version":"9.12.2.1","status":"affected"},{"version":"9.12.4.2","status":"affected"},{"version":"9.14.1.6","status":"affected"},{"version":"9.8.3.8","status":"affected"},{"version":"9.14.1.15","status":"affected"},{"version":"9.14.1.19","status":"affected"},{"version":"9.8.4.26","status":"affected"},{"version":"9.12.4.4","status":"affected"},{"version":"9.14.1.30","status":"affected"},{"version":"9.8.4.29","status":"affected"},{"version":"9.12.4.7","status":"affected"},{"version":"9.15.1","status":"affected"},{"version":"9.14.2","status":"affected"},{"version":"9.12.4.8","status":"affected"},{"version":"9.8.4.32","status":"affected"},{"version":"9.12.4.10","status":"affected"},{"version":"9.14.2.4","status":"affected"},{"version":"9.15.1.7","status":"affected"},{"version":"9.14.2.8","status":"affected"},{"version":"9.12.4.13","status":"affected"},{"version":"9.8.4.33","status":"affected"},{"version":"9.15.1.10","status":"affected"},{"version":"9.14.2.13","status":"affected"},{"version":"9.8.4.34","status":"affected"},{"version":"9.12.4.18","status":"affected"},{"version":"9.15.1.15","status":"affected"},{"version":"9.8.4.35","status":"affected"},{"version":"9.14.2.15","status":"affected"},{"version":"9.12.4.24","status":"affected"},{"version":"9.16.1","status":"affected"},{"version":"9.15.1.16","status":"affected"},{"version":"9.8.4.39","status":"affected"},{"version":"9.14.3","status":"affected"},{"version":"9.12.4.26","status":"affected"},{"version":"9.16.1.28","status":"affected"},{"version":"9.14.3.1","status":"affected"},{"version":"9.12.4.29","status":"affected"},{"version":"9.14.3.9","status":"affected"},{"version":"9.16.2","status":"affected"},{"version":"9.12.4.30","status":"affected"},{"version":"9.16.2.3","status":"affected"},{"version":"9.8.4.40","status":"affected"},{"version":"9.14.3.11","status":"affected"},{"version":"9.15.1.17","status":"affected"},{"version":"9.12.4.35","status":"affected"},{"version":"9.8.4.41","status":"affected"},{"version":"9.15.1.1","status":"affected"},{"version":"9.14.3.13","status":"affected"},{"version":"9.16.2.7","status":"affected"},{"version":"9.12.4.37","status":"affected"},{"version":"9.14.3.15","status":"affected"},{"version":"9.17.1","status":"affected"},{"version":"9.16.2.11","status":"affected"},{"version":"9.14.3.18","status":"affected"},{"version":"9.16.2.13","status":"affected"},{"version":"9.12.4.39","status":"affected"},{"version":"9.12.4.38","status":"affected"},{"version":"9.8.4.43","status":"affected"},{"version":"9.14.4","status":"affected"},{"version":"9.16.2.14","status":"affected"},{"version":"9.17.1.7","status":"affected"},{"version":"9.12.4.40","status":"affected"},{"version":"9.15.1.21","status":"affected"},{"version":"9.16.3.3","status":"affected"},{"version":"9.14.4.6","status":"affected"},{"version":"9.16.3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