CVE-2021-34753 MEDIUM

CVE-2021-34753: Cisco Firepower Threat Defense Ethernet Industrial Protocol Policy Bypass Vulnerabilities

Vendor Cisco
Product Cisco Firepower Threat Defense Software
Weakness CWE-284
Published November 15, 2024
Last update November 15, 2024

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

What the vulnerability does

01Description

A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. This vulnerability is due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit this vulnerability by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should trigger and drop for the ENIP packet.

Key dates

02Disclosure timeline

November 15, 2024 CVE published
November 15, 2024 Record updated