CVE-2023-20177

A vulnerability in the SSL file policy implementation of Cisco Firepower Threat Defense (FTD) Software that occurs when the SSL/TLS connection is configured with a URL Category and the Snort 3 detection engine could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart. This vulnerability exists because a logic error occurs when a Snort 3 detection engine inspects an SSL/TLS connection that has either a URL Category configured on the SSL file policy or a URL Category configured on an access control policy with TLS server identity discovery enabled. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a crafted SSL/TLS connection through an affected device. A successful exploit could allow the attacker to trigger an unexpected reload of the Snort 3 detection engine, resulting in either a bypass or denial of service (DoS) condition, depending on device configuration. The Snort 3 detection engine will restart automatically. No manual intervention is required.

• cisco secure firewall threat defense 7.0.0 • cisco secure firewall threat defense 7.0.0.1 • cisco secure firewall threat defense 7.0.1 • cisco secure firewall threat defense 7.0.1.1 • cisco secure firewall threat defense 7.0.2 • cisco secure firewall threat defense 7.0.2.1 • cisco secure firewall threat defense 7.0.3 • cisco secure firewall threat defense 7.0.4 • cisco secure firewall threat defense 7.0.5 • cisco secure firewall threat defense 7.1.0 • cisco secure firewall threat defense 7.1.0.1 • cisco secure firewall threat defense 7.1.0.2 • cisco secure firewall threat defense 7.1.0.3 • cisco secure firewall threat defense 7.2.0 • cisco secure firewall threat defense 7.2.0.1 • cisco secure firewall threat defense 7.2.1 • cisco secure firewall threat defense 7.2.2 • cisco secure firewall threat defense 7.2.3 • cisco secure firewall threat defense 7.3.0 • cisco secure firewall threat defense 7.3.1 • cisco secure firewall threat defense 7.3.1.1