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Cisco Firepower Threat Defense Software TCP Snort 3 Detection Engine Bypass Vulnerability

cisco-sa-snort-bypass-PTry37fX · Medium · Published · Updated

A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies on an affected system. Devices that are configured with Snort 2 are not affected by this vulnerability.  This vulnerability is due to a logic error when handling embryonic (half-open) TCP connections. An attacker could exploit this vulnerability by sending a crafted traffic pattern through an affected device. A successful exploit could allow unintended traffic to enter the network protected by the affected device. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-bypass-PTry37fX This advisory is part of the October 2024 release of the Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2024 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.

Cisco advisory ·CSAF JSON

Workarounds

There is a workaround that addresses this vulnerability. To implement the workaround, turn off pkt-decode-optimization using the no asp inspect-dp pkt-decode-optimization FTD CLI command, as shown in the following example:

FTD# no asp inspect-dp pkt-decode-optimization
FTD#

While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

CVEsCVE-2024-20407
Cisco Bug IDsCSCwi42291
CVSS ScoreBase 5.8
Base 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco Firepower Threat Defense Software 6.2.3, Cisco Firepower Threat Defense Software 6.2.3.1, Cisco Firepower Threat Defense Software 6.2.3.2, Cisco Firepower Threat Defense Software 6.2.3.3, Cisco Firepower Threat Defense Software 6.2.3.4, Cisco Firepower Threat Defense Software 6.2.3.5, Cisco Firepower Threat Defense Software 6.2.3.6, Cisco Firepower Threat Defense Software 6.2.3.7, Cisco Firepower Threat Defense Software 6.2.3.8, Cisco Firepower Threat Defense Software 6.2.3.10, Cisco Firepower Threat Defense Software 6.2.3.11, Cisco Firepower Threat Defense Software 6.2.3.9, Cisco Firepower Threat Defense Software 6.2.3.12, Cisco Firepower Threat Defense Software 6.2.3.13, Cisco Firepower Threat Defense Software 6.2.3.14, Cisco Firepower Threat Defense Software 6.2.3.15, Cisco Firepower Threat Defense Software 6.2.3.16, Cisco Firepower Threat Defense Software 6.2.3.17, Cisco Firepower Threat Defense Software 6.2.3.18, Cisco Firepower Threat Defense Software 6.6.0, Cisco Firepower Threat Defense Software 6.6.0.1, Cisco Firepower Threat Defense Software 6.6.1, Cisco Firepower Threat Defense Software 6.6.3, Cisco Firepower Threat Defense Software 6.6.4, Cisco Firepower Threat Defense Software 6.6.5, Cisco Firepower Threat Defense Software 6.6.5.1, Cisco Firepower Threat Defense Software 6.6.5.2, Cisco Firepower Threat Defense Software 6.6.7, Cisco Firepower Threat Defense Software 6.6.7.1, Cisco Firepower Threat Defense Software 6.6.7.2, Cisco Firepower Threat Defense Software 6.4.0, Cisco Firepower Threat Defense Software 6.4.0.1, Cisco Firepower Threat Defense Software 6.4.0.3, Cisco Firepower Threat Defense Software 6.4.0.2, Cisco Firepower Threat Defense Software 6.4.0.4, Cisco Firepower Threat Defense Software 6.4.0.5, Cisco Firepower Threat Defense Software 6.4.0.6, Cisco Firepower Threat Defense Software 6.4.0.7, Cisco Firepower Threat Defense Software 6.4.0.8, Cisco Firepower Threat Defense Software 6.4.0.9, Cisco Firepower Threat Defense Software 6.4.0.10, Cisco Firepower Threat Defense Software 6.4.0.11, Cisco Firepower Threat Defense Software 6.4.0.12, Cisco Firepower Threat Defense Software 6.4.0.13, Cisco Firepower Threat Defense Software 6.4.0.14, Cisco Firepower Threat Defense Software 6.4.0.15, Cisco Firepower Threat Defense Software 6.4.0.16, Cisco Firepower Threat Defense Software 6.4.0.17, Cisco Firepower Threat Defense Software 6.4.0.18, Cisco Firepower Threat Defense Software 7.0.0, Cisco Firepower Threat Defense Software 7.0.0.1, Cisco Firepower Threat Defense Software 7.0.1, Cisco Firepower Threat Defense Software 7.0.1.1, Cisco Firepower Threat Defense Software 7.0.2, Cisco Firepower Threat Defense Software 7.0.2.1, Cisco Firepower Threat Defense Software 7.0.3, Cisco Firepower Threat Defense Software 7.0.4, Cisco Firepower Threat Defense Software 7.0.5, Cisco Firepower Threat Defense Software 7.0.6, Cisco Firepower Threat Defense Software 7.0.6.1, Cisco Firepower Threat Defense Software 7.0.6.2, 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 7.3.0, 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 Secure Firewall Threat Defense (FTD) Software, Cisco Firepower 2100 Series, Cisco Firepower 1000 Series, Cisco ASA 5500-X Series Firewalls, 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

Related Products

Product CVE Evidence
Cisco Secure Firewall Threat Defense Virtual CVE-2024-20407 Cisco OpenVuln
Cisco Secure Firewall Threat Defense (FTD) Software CVE-2024-20407 Cisco OpenVuln
Cisco Secure Firewall 4200 Series CVE-2024-20407 Cisco OpenVuln
Cisco Secure Firewall 3100 Series CVE-2024-20407 Cisco OpenVuln
Cisco Firepower Threat Defense Software CVE-2024-20407 Cisco OpenVuln
Cisco Firepower 9000 Series CVE-2024-20407 Cisco OpenVuln
Cisco Firepower 4100 Series CVE-2024-20407 Cisco OpenVuln
Cisco Firepower 2100 Series CVE-2024-20407 Cisco OpenVuln
Cisco Firepower 1000 Series CVE-2024-20407 Cisco OpenVuln
Cisco ASA 5500-X Series Firewalls CVE-2024-20407 Cisco OpenVuln
Cisco 3000 Series Industrial Security Appliances (ISA) CVE-2024-20407 Cisco OpenVuln