VULNERABILITY INTELLIGENCE

CVE-2023-20270

CVSS score5.8 MEDIUM
EPSS probability0.67%
CISA KEVNot currently listed
Published2023-11-01
Last modified2026-08-11
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Description

A vulnerability in the interaction between the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the configured policies or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error-checking when the Snort 3 detection engine is processing SMB traffic. An attacker could exploit this vulnerability by sending a crafted SMB packet stream through an affected device. A successful exploit could allow the attacker to cause the Snort process to reload, resulting in a DoS condition.

Weakness classification

  • psirt@cisco.com: CWE-20
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references