CVE-2021-1236: cisco cisco firepower threat defense software

Vulnerability summary

CVE-2021-1236 is a medium (CVSS 5.3) vulnerability in cisco cisco firepower threat defense software. EPSS estimates a 2.19% chance of exploitation in the next 30 days, higher than 82.1% of scored vulnerabilities.

Timeline

1. 13-01-2021
   PublishedVulnerability first disclosed.
2. 12-11-2024
   Last modifiedVulnerability information updated.

Description

Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.

• CWE-670Always-Incorrect Control Flow ImplementationThe code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.