CVE-2021-1224: cisco cisco firepower threat defense software Protection Mechanism Failure

Vulnerability summary

CVE-2021-1224 is a medium (CVSS 5.8) Protection Mechanism Failure vulnerability in cisco cisco firepower threat defense software. EPSS estimates a 2.05% chance of exploitation in the next 30 days, higher than 80.9% 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 with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

• CWE-693Protection Mechanism FailureThe product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.