CVE-2019-1980
MediumCVSS 5.3Exploitation Probability (EPSS)
Elevated risk59th percentile - higher than 59% of all known CVEs
Summary
A vulnerability in the protocol detection component of Cisco Firepower Threat Defense, FirePOWER Services for ASA, and Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. This is due to improper detection of initial protocol use on a nonstandard port. An attacker could send traffic on a nonstandard port to bypass filtering and deliver malicious requests to protected systems.
Risk Assessment
The risk is the potential to bypass filtering rules and deliver malicious traffic to protected systems, potentially leading to security compromise.
Recommendation
It is recommended to update the software to a patched version and configure rules for nonstandard protocol ports.
Original NVD description (English source)
A vulnerability in the protocol detection 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 detection of the initial use of a protocol on a nonstandard port. An attacker could exploit this vulnerability by sending traffic on a nonstandard port for the protocol in use 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. Once the initial protocol flow on the nonstandard port is detected, future flows on the nonstandard port will be successfully detected and handled as configured by the applied policy.