Cisco Secure Firewall Threat Defense vulnerabilities

A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software is caused by improper buffer management during TLS 1.3 connection handling. An unauthenticated remote attacker can send a crafted TLS 1.3 packet through a TLS 1.3-enabled listening socket, causing the LINA process to crash and the device to reload unexpectedly (DoS).

A vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software allows an authenticated local attacker with a low-privileged account to cause the device to unexpectedly reload, resulting in a DoS condition. This is due to improper validation of user-supplied input.

A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software allows an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This is due to a logic error in memory management during SSL packet inspection. A successful exploit could cause a DoS condition.

A vulnerability in the CLI of Cisco Secure FTD Software allows an authenticated local attacker with administrative credentials to execute arbitrary commands on the underlying operating system as root. This is due to insufficient input validation of user-supplied command arguments.

A vulnerability in the Snort 2 and Snort 3 deep packet inspection of Cisco Secure Firewall Threat Defense (FTD) Software allows an unauthenticated, remote attacker to bypass configured Snort rules and allow traffic onto the network that should have been dropped. This is due to a logic error in the integration of Snort Engine rules with FTD Software.

A vulnerability in the TLS cryptography functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software allows an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to unexpectedly restart, resulting in a DoS condition. This is due to improper implementation of the TLS protocol. TLS 1.3 is not affected.