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Medium severity4.0NVD Advisory· Published Nov 1, 2023· Updated Aug 11, 2026

CVE-2023-20031

CVE-2023-20031

Description

A vulnerability in the SSL/TLS certificate handling of Snort 3 Detection Engine integration with Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to restart. This vulnerability is due to a logic error that occurs when an SSL/TLS certificate that is under load is accessed when it is initiating an SSL connection. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a high rate of SSL/TLS connection requests to be inspected by the Snort 3 detection engine on an affected device. A successful exploit could allow the attacker to cause the Snort 3 detection engine to reload, resulting in either a bypass or a denial of service (DoS) condition, depending on device configuration. The Snort detection engine will restart automatically. No manual intervention is required.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

17
  • Cisco Systems, Inc./Secure Firewall Threat Defense15 versions
    cpe:2.3:a:cisco:secure_firewall_threat_defense:6.7.0.1:*:*:*:*:*:*:*+ 14 more
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.7.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.7.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.7.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.7.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Firepower Threat Defense Softwarellm-fuzzy2 versions
    (expand)+ 1 more
    • (no CPE)
    • (no CPE)range: 6.7.0

Patches

Vulnerability mechanics

References

1

News mentions

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