CVE-2021-44079 : Exploit Details and Defense Strategies

In the wazuh-slack active response script in Wazuh 4.2.x before 4.2.5, untrusted user agents are passed to a curl command line, potentially resulting in remote code execution.

Understanding CVE-2021-44079

What is CVE-2021-44079?

CVE-2021-44079 is a vulnerability found in the wazuh-slack active response script in Wazuh 4.2.x before 4.2.5 which allows untrusted user agents to be passed to a curl command line, creating a risk of remote code execution.

The Impact of CVE-2021-44079

The exploitation of this vulnerability could lead to an attacker remotely executing malicious code on the affected system, potentially compromising sensitive data and system integrity.

Technical Details of CVE-2021-44079

Vulnerability Description

The vulnerability lies in the handling of user agents in the wazuh-slack active response script, allowing malicious actors to execute arbitrary code via the curl command line.

Affected Systems and Versions

Product: Wazuh
Versions Affected: 4.2.x (before 4.2.5)

Exploitation Mechanism

Attackers can exploit this vulnerability by providing malicious user agents through the active response script to trigger remote code execution.

Mitigation and Prevention

Immediate Steps to Take

Upgrade Wazuh to version 4.2.5 or later to mitigate the vulnerability.
Review and restrict the use of the wazuh-slack active response script.

Long-Term Security Practices

Regularly update and patch Wazuh installations to address known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential security breaches.

Patching and Updates

Apply patches and updates provided by Wazuh promptly to ensure the security of the system.