CVE-2021-33816 Explained : Impact and Mitigation

Dolibarr 13.0.2, a popular website builder module, is vulnerable to remote PHP code execution due to an incomplete protection mechanism. This vulnerability allows attackers to execute arbitrary code by bypassing certain restrictions.

Understanding CVE-2021-33816

This section will cover the key details related to CVE-2021-33816 in Dolibarr 13.0.2.

What is CVE-2021-33816?

The vulnerability in Dolibarr 13.0.2 enables remote attackers to execute PHP code through a website builder module. The flaw lies in the incomplete protection mechanism implemented.

The Impact of CVE-2021-33816

The impact of this vulnerability is severe as it allows threat actors to remotely execute malicious PHP code on the affected system, potentially leading to a complete compromise of the system.

Technical Details of CVE-2021-33816

Let's delve into the technical aspects of CVE-2021-33816 to understand how this vulnerability operates.

Vulnerability Description

The issue arises due to an incomplete protection mechanism that fails to block backticks, allowing attackers to execute PHP code through the Dolibarr website builder module.

Affected Systems and Versions

Dolibarr version 13.0.2 is specifically affected by this vulnerability, exposing systems with this version to the risk of remote PHP code execution.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious payloads containing PHP code and injecting them through the website builder module to execute arbitrary commands.

Mitigation and Prevention

To protect systems from CVE-2021-33816, it is crucial to implement immediate mitigations and adopt long-term security practices to prevent similar exploits in the future.

Immediate Steps to Take

Update Dolibarr to the latest version or apply patches provided by the vendor immediately.
Restrict access to the website builder module to authorized personnel only.

Long-Term Security Practices

Conduct regular security assessments and audits to identify and address vulnerabilities proactively.
Educate users and administrators about secure coding practices and the risks associated with untrusted inputs.

Patching and Updates

Stay informed about security updates and patches released by Dolibarr and promptly apply them to ensure that known vulnerabilities are addressed and security posture is strengthened.