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Cisco Secure Firewall Threat Defense Software Snort 3 Denial of Service Vulnerability

cisco-sa-ftd-dos-SvKhtjgt · High · Published · Updated

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-SvKhtjgt This advisory is part of the August 2025 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: August 2025 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication.

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2025-20217
Cisco Bug IDsCSCwm44719
CVSS ScoreBase 8.6
Base 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Firepower Threat Defense Software 7.1.0, Cisco Firepower Threat Defense Software 7.1.0.1, Cisco Firepower Threat Defense Software 7.1.0.2, Cisco Firepower Threat Defense Software 7.1.0.3, Cisco Firepower Threat Defense Software 7.2.0, Cisco Firepower Threat Defense Software 7.2.0.1, Cisco Firepower Threat Defense Software 7.2.1, Cisco Firepower Threat Defense Software 7.2.2, Cisco Firepower Threat Defense Software 7.2.3, Cisco Firepower Threat Defense Software 7.2.4, Cisco Firepower Threat Defense Software 7.2.4.1, Cisco Firepower Threat Defense Software 7.2.5, Cisco Firepower Threat Defense Software 7.2.5.1, Cisco Firepower Threat Defense Software 7.2.6, Cisco Firepower Threat Defense Software 7.2.7, Cisco Firepower Threat Defense Software 7.2.5.2, Cisco Firepower Threat Defense Software 7.2.8, Cisco Firepower Threat Defense Software 7.2.8.1, Cisco Firepower Threat Defense Software 7.2.9, Cisco Firepower Threat Defense Software 7.3.0, Cisco Firepower Threat Defense Software 7.3.1, Cisco Firepower Threat Defense Software 7.3.1.1, Cisco Firepower Threat Defense Software 7.3.1.2, Cisco Firepower Threat Defense Software 7.4.0, Cisco Firepower Threat Defense Software 7.4.1, Cisco Firepower Threat Defense Software 7.4.1.1, Cisco Firepower Threat Defense Software 7.4.2, Cisco Firepower Threat Defense Software 7.4.2.1, Cisco Firepower Threat Defense Software 7.6.0, Cisco Secure Firewall Threat Defense (FTD) Software, Cisco Firepower 2100 Series, Cisco Firepower 1000 Series, Cisco 3000 Series Industrial Security Appliances (ISA), Cisco Firepower 9000 Series, Cisco Firepower 4100 Series, Cisco Secure Firewall Threat Defense Virtual, Cisco Secure Firewall 3100 Series, Cisco Secure Firewall 4200 Series, Cisco Secure Firewall 1200 Series

Related Products

Product CVE Evidence
Cisco Secure Firewall Threat Defense Virtual CVE-2025-20217 Cisco OpenVuln
Cisco Secure Firewall Threat Defense (FTD) Software CVE-2025-20217 Cisco OpenVuln
Cisco Secure Firewall 4200 Series CVE-2025-20217 Cisco OpenVuln
Cisco Secure Firewall 3100 Series CVE-2025-20217 Cisco OpenVuln
Cisco Secure Firewall 1200 Series CVE-2025-20217 Cisco OpenVuln
Cisco Firepower Threat Defense Software CVE-2025-20217 Cisco OpenVuln
Cisco Firepower 9000 Series CVE-2025-20217 Cisco OpenVuln
Cisco Firepower 4100 Series CVE-2025-20217 Cisco OpenVuln
Cisco Firepower 2100 Series CVE-2025-20217 Cisco OpenVuln
Cisco Firepower 1000 Series CVE-2025-20217 Cisco OpenVuln
Cisco 3000 Series Industrial Security Appliances (ISA) CVE-2025-20217 Cisco OpenVuln