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High severity7.5NVD Advisory· Published Nov 15, 2024· Updated Aug 11, 2026

CVE-2022-20685

CVE-2022-20685

Description

A vulnerability in the Modbus preprocessor of the Snort detection engine could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an integer overflow while processing Modbus traffic. An attacker could exploit this vulnerability by sending crafted Modbus traffic through an affected device. A successful exploit could allow the attacker to cause the Snort process to hang, causing traffic inspection to stop.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

AI Insight

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

Affected products

108
  • Cisco Systems, Inc./Cyber Vision17 versions
    cpe:2.3:a:cisco:cyber_vision:3.0.0:*:*:*:*:*:*:*+ 16 more
    • cpe:2.3:a:cisco:cyber_vision:3.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.0.6:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.1.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.1.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.2.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.2.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:3.2.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:4.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:cyber_vision:4.0.1:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Secure Firewall Threat Defense44 versions
    cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.10:*:*:*:*:*:*:*+ 43 more
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.10:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.11:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.12:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.13:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.14:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.15:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.16:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.17:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.18:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.5:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.6:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.7:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.8:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.9:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.10:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.11:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.12:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.6:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.7:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.8:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.9:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.0:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.1:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.3:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.4:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:secure_firewall_threat_defense:6.6.5:*:*:*:*:*:*:*
    • 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:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Unified Threat Defense Snort Intrusion Prevention System Engine43 versions
    cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.1a:*:*:*:*:*:*:*+ 42 more
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.5:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.12.6:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.10:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.5:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.6:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.7a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:16.6.9:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.1.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.2.1r:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.3.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.3.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.3.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.3.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.3.4a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.4.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.4.1b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.4.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.5.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.5.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.7.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:3.17.0s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:3.17.1s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:denali-16.3.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:denali-16.3.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:denali-16.3.5:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:denali-16.3.7:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:denali-16.3.9:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:everest-16.6.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:everest-16.6.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:everest-16.6.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.5:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.6:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.7:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:fuji-16.9.8:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Snortllm-fuzzy
  • Cisco Systems, Inc./Cyber Vision Centercpe-rescue
    Range: 3.0.0
  • Cisco Systems, Inc./Firepower Threat Defense Softwarecpe-rescue
    Range: 6.2.3.14
  • Cisco/Cisco UTD SNORT IPS Engine Softwarev5
    Range: 3.17.1S

Patches

Vulnerability mechanics

References

2

News mentions

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