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Vulnerability Details 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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 1.3%

CVSS Severity

CVSS v3 Score 4.0

References

Products affected by CVE-2023-20177

Cisco » Firepower Threat Defense » Version: 7.0.0

cpe:2.3:a:cisco:firepower_threat_defense:7.0.0
Cisco » Firepower Threat Defense » Version: 7.0.0.1

cpe:2.3:a:cisco:firepower_threat_defense:7.0.0.1
Cisco » Firepower Threat Defense » Version: 7.0.1

cpe:2.3:a:cisco:firepower_threat_defense:7.0.1
Cisco » Firepower Threat Defense » Version: 7.0.1.1

cpe:2.3:a:cisco:firepower_threat_defense:7.0.1.1
Cisco » Firepower Threat Defense » Version: 7.0.2

cpe:2.3:a:cisco:firepower_threat_defense:7.0.2
Cisco » Firepower Threat Defense » Version: 7.0.2.1

cpe:2.3:a:cisco:firepower_threat_defense:7.0.2.1
Cisco » Firepower Threat Defense » Version: 7.0.3

cpe:2.3:a:cisco:firepower_threat_defense:7.0.3
Cisco » Firepower Threat Defense » Version: 7.0.4

cpe:2.3:a:cisco:firepower_threat_defense:7.0.4
Cisco » Firepower Threat Defense » Version: 7.0.5

cpe:2.3:a:cisco:firepower_threat_defense:7.0.5
Cisco » Firepower Threat Defense » Version: 7.1.0

cpe:2.3:a:cisco:firepower_threat_defense:7.1.0
Cisco » Firepower Threat Defense » Version: 7.1.0.1

cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.1
Cisco » Firepower Threat Defense » Version: 7.1.0.2

cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.2
Cisco » Firepower Threat Defense » Version: 7.1.0.3

cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.3
Cisco » Firepower Threat Defense » Version: 7.2.0

cpe:2.3:a:cisco:firepower_threat_defense:7.2.0
Cisco » Firepower Threat Defense » Version: 7.2.0.1

cpe:2.3:a:cisco:firepower_threat_defense:7.2.0.1
Cisco » Firepower Threat Defense » Version: 7.2.1

cpe:2.3:a:cisco:firepower_threat_defense:7.2.1
Cisco » Firepower Threat Defense » Version: 7.2.2

cpe:2.3:a:cisco:firepower_threat_defense:7.2.2
Cisco » Firepower Threat Defense » Version: 7.2.3

cpe:2.3:a:cisco:firepower_threat_defense:7.2.3
Cisco » Firepower Threat Defense » Version: 7.3.0

cpe:2.3:a:cisco:firepower_threat_defense:7.3.0
Cisco » Firepower Threat Defense » Version: 7.3.1

cpe:2.3:a:cisco:firepower_threat_defense:7.3.1
Cisco » Firepower Threat Defense » Version: 7.3.1.1

cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2023-20177

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