cisco firepower-management-center CVE-2021-1236 in Cisco and Snort Products
Published on January 13, 2021

Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability

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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.

Vendor Advisory Vendor Advisory NVD

Weakness Type

Always-Incorrect Control Flow Implementation

The 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. This weakness captures cases in which a particular code segment is always incorrect with respect to the algorithm that it is implementing. For example, if a C programmer intends to include multiple statements in a single block but does not include the enclosing braces (CWE-483), then the logic is always incorrect. This issue is in contrast to most weaknesses in which the code usually behaves correctly, except when it is externally manipulated in malicious ways.


Products Associated with CVE-2021-1236

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-1236 are published in these products:

Cisco Firepower Management Center
 
Cisco Firepower Threat Defense
 
Snort
 
Cisco Secure Firewall Management Center
 
Cisco Firepower Threat Defense Software
 

Affected Versions

Cisco Firepower Threat Defense Software Version n/a is affected by CVE-2021-1236

Exploit Probability

EPSS
0.20%
Percentile
41.98%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.