CVE-2021-40114 MEDIUM

CVE-2021-40114: Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability

Vendor Cisco
Product Cisco Firepower Threat Defense Software
Weakness CWE-770 · Uncontrolled resource consumption
Published October 27, 2021
Last update November 7, 2024

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.

Key dates

02Disclosure timeline

October 27, 2021 CVE published
November 7, 2024 Record updated