CVE-2024-20331

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. This 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.

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. This 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.

Una vulnerabilidad en la función de autenticación de sesión de la función VPN SSL de acceso remoto del software Cisco Adaptive Security Appliance (ASA) y del software Cisco Firepower Threat Defense (FTD) podría permitir que un atacante remoto no autenticado impida que los usuarios se autentiquen. Esta vulnerabilidad se debe a una entropía insuficiente en el proceso de autenticación. Un atacante podría aprovechar esta vulnerabilidad determinando el identificador de un usuario que se autentica y utilizándolo para finalizar su sesión de autenticación. Una explotación exitosa podría permitir al atacante obligar a un usuario a reiniciar el proceso de autenticación, lo que impediría que un usuario legítimo estableciera sesiones VPN de acceso remoto.