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CVE-2024-20342

Cisco Firepower Threat Defense Software Rate Filter Bypass Vulnerability

Published: Oct 23, 2024Updated: Aug 11, 2025 Sources: CVE List NVD BDUCWE-1025
NVD MITRE
5.8CVSSMEDIUM
EPSS Score
0.5%
Top 60.6%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

Multiple Cisco products are affected by a vulnerability in the rate filtering feature of the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured rate limiting filter.  This vulnerability is due to an incorrect connection count comparison. An attacker could exploit this vulnerability by sending traffic through an affected device at a rate that exceeds a configured rate filter. A successful exploit could allow the attacker to successfully bypass the rate filter. This could allow unintended traffic to enter the network protected by the affected device.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-1025

Affected Products

Cisco Firepower Threat Defense SoftwareCiscoNetworking Infrastructure
Firepower Threat DefenseCisco Systems Inc.Networking Infrastructure
SnortCisco Systems Inc.Networking Infrastructure
snortciscoNetworking Infrastructure
firepower threat defense softwareciscoNetworking Infrastructure
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-rf-bypass-OY8f3pnM
sec.cloudapps.cisco.com

Timeline

Published
Oct 23, 2024
Last Updated
Aug 11, 2025

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