CVE-2025-20217

Summary

A vulnerability in the packet inspection functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to incorrect processing of traffic that is inspected by an affected device. An attacker could exploit this vulnerability by sending crafted traffic through the affected device. A successful exploit could allow the attacker to cause the affected device to enter an infinite loop while inspecting traffic, resulting in a DoS condition. The system watchdog will restart the Snort process automatically.

Affected Software

VendorProductVersion RangeStatus
CiscoCisco Firepower Threat Defense Software7.1.0affected
CiscoCisco Firepower Threat Defense Software7.1.0.1affected
CiscoCisco Firepower Threat Defense Software7.2.0affected
CiscoCisco Firepower Threat Defense Software7.1.0.2affected
CiscoCisco Firepower Threat Defense Software7.2.0.1affected
CiscoCisco Firepower Threat Defense Software7.2.1affected
CiscoCisco Firepower Threat Defense Software7.3.0affected
CiscoCisco Firepower Threat Defense Software7.2.2affected
CiscoCisco Firepower Threat Defense Software7.2.3affected
CiscoCisco Firepower Threat Defense Software7.3.1affected
CiscoCisco Firepower Threat Defense Software7.1.0.3affected
CiscoCisco Firepower Threat Defense Software7.2.4affected
CiscoCisco Firepower Threat Defense Software7.2.5affected
CiscoCisco Firepower Threat Defense Software7.2.4.1affected
CiscoCisco Firepower Threat Defense Software7.3.1.1affected
CiscoCisco Firepower Threat Defense Software7.4.0affected
CiscoCisco Firepower Threat Defense Software7.2.5.1affected
CiscoCisco Firepower Threat Defense Software7.4.1affected
CiscoCisco Firepower Threat Defense Software7.2.6affected
CiscoCisco Firepower Threat Defense Software7.4.1.1affected
CiscoCisco Firepower Threat Defense Software7.2.7affected
CiscoCisco Firepower Threat Defense Software7.2.5.2affected
CiscoCisco Firepower Threat Defense Software7.3.1.2affected
CiscoCisco Firepower Threat Defense Software7.2.8affected
CiscoCisco Firepower Threat Defense Software7.6.0affected
CiscoCisco Firepower Threat Defense Software7.4.2affected
CiscoCisco Firepower Threat Defense Software7.2.8.1affected
CiscoCisco Firepower Threat Defense Software7.4.2.1affected
CiscoCisco Firepower Threat Defense Software7.2.9affected

Weaknesses

  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References