CVE-2019-1691

CVE-2019-1691 describes a denial-of-service vulnerability in Cisco Firepower Threat Defense Software, affecting versions prior to 6.2.3.4. An unauthenticated, remote attacker can exploit incomplete error handling during SSL/TLS connection establishment by sending a crafted packet, causing the SNORT detection engine to unexpectedly restart. This vulnerability has a CVSS score of 5.8 (Medium), indicating a low attack complexity and no user interaction required, leading to a partial denial of service. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.