CVE-2019-1978
MediumCVSS 5.8Exploitation Probability (EPSS)
Very high risk95th percentile - higher than 95% of all known CVEs
Summary
A vulnerability in the stream reassembly component of Cisco Firepower Threat Defense Software, FirePOWER Services Software for ASA, and Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The issue is due to improper reassembly of traffic streams. An attacker could exploit this by sending crafted streams through an affected device, potentially delivering malicious requests to protected systems.
Risk Assessment
The risk is that an attacker can bypass security filters and deliver malicious traffic to protected systems, potentially compromising the network.
Recommendation
It is recommended to upgrade the software to a patched version and follow vendor guidance for configuration.
Original NVD description (English source)
A vulnerability in the stream reassembly component of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to improper reassembly of traffic streams. An attacker could exploit this vulnerability by sending crafted streams through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious requests to protected systems that would otherwise be blocked.