CVE-2021-43266 Explained : Impact and Mitigation

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, exporting collections via PDF export could lead to code execution via shell metacharacters in a collection name. Additionally, in Mahara before 20.10.4, 21.04.3, and 21.10.1, exporting collections via PDF export could cause code execution.

Understanding CVE-2021-43266

This CVE affects Mahara versions, allowing code execution via PDF export vulnerabilities.

What is CVE-2021-43266?

The vulnerability in Mahara prior to specific versions allows threat actors to execute code through PDF export functionalities.

The Impact of CVE-2021-43266

The vulnerability could result in unauthorized code execution, potentially leading to system compromise and data breaches.

Technical Details of CVE-2021-43266

This section provides technical insights into the vulnerability.

Vulnerability Description

Exporting collections via PDF in affected Mahara versions can enable code execution through manipulated collection names.

Affected Systems and Versions

Mahara versions before 20.04.5, 20.10.3, 21.04.2, and 21.10.0
Mahara versions before 20.10.4, 21.04.3, and 21.10.1

Exploitation Mechanism

The vulnerability exploits shell metacharacters in collection names during PDF export, enabling malicious code execution.

Mitigation and Prevention

Protect systems from CVE-2021-43266 using the following strategies.

Immediate Steps to Take

Update Mahara to versions 20.04.5, 20.10.4, 21.04.3, or 21.10.1
Avoid exporting collections with malicious names

Long-Term Security Practices

Regular security assessments and audits
Employee cybersecurity training to enhance awareness

Patching and Updates

Apply patches promptly to mitigate vulnerabilities