VULNERABILITY INTELLIGENCE

CVE-2024-20407

CVSS score5.8 MEDIUM
EPSS probability0.40%
CISA KEVNot currently listed
Published2024-10-23
Last modified2026-08-11
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Description

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.

Weakness classification

  • psirt@cisco.com: CWE-399
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references