CVE-2022-36036 Explained : Impact and Mitigation

This article provides details about CVE-2022-36036, an 'Improper Control of Generation of Code ('Code Injection')' vulnerability found in mdx-mermaid.

Understanding CVE-2022-36036

CVE-2022-36036 is a vulnerability in mdx-mermaid that allows for arbitrary JavaScript injection in specific versions, potentially leading to code execution when loaded by MDXjs.

What is CVE-2022-36036?

mdx-mermaid, a tool that enables Mermaid access in MDX, is affected by a code injection vulnerability in versions less than 1.3.0 and 2.0.0-rc1. This flaw was addressed in versions 1.3.0 and 2.0.0-rc2. The vulnerability allows attackers to insert arbitrary code into mermaid code blocks, which can be executed upon component loading.

The Impact of CVE-2022-36036

With a CVSS base score of 3.6 (Low severity), the vulnerability has a high attack complexity and requires local access. Although the confidentiality, integrity, and availability impacts are low, exploitation can result in code injection.

Technical Details of CVE-2022-36036

Vulnerability Description

The vulnerability arises from improper handling of code generation in mdx-mermaid, allowing malicious code injection in vulnerable versions.

Affected Systems and Versions

Versions of mdx-mermaid prior to 1.3.0 and 2.0.0-rc1 are affected by this vulnerability, while versions 1.3.0 and 2.0.0-rc2 contain patches to mitigate the issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting arbitrary JavaScript code into mermaid code blocks. This code will execute when the component is loaded by MDXjs.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to update mdx-mermaid to the patched versions 1.3.0 or 2.0.0-rc2 to mitigate the vulnerability. Additionally, code review for any injected code is recommended.

Long-Term Security Practices

To enhance security, developers should follow secure coding practices, avoid using unchecked code from untrusted sources, and stay informed about security advisories.

Patching and Updates

Regularly check for security updates and apply patches promptly to ensure the software is protected against known vulnerabilities.