CVE-2022-29078 : Security Advisory and Response

A server-side template injection vulnerability has been identified in the ejs (Embedded JavaScript templates) package version 3.1.6 for Node.js. This vulnerability allows attackers to execute arbitrary OS commands during template compilation.

Understanding CVE-2022-29078

This CVE involves a critical security issue that could lead to remote code execution (RCE) on systems using the vulnerable ejs package.

What is CVE-2022-29078?

The ejs package version 3.1.6 for Node.js is susceptible to server-side template injection, where an attacker can manipulate the outputFunctionName setting to execute malicious OS commands during template compilation.

The Impact of CVE-2022-29078

Exploitation of this vulnerability can result in unauthorized remote code execution, granting attackers the ability to take control of the affected Node.js server and potentially compromise sensitive data.

Technical Details of CVE-2022-29078

This section provides a detailed overview of the vulnerability, including affected systems, exploitation mechanism, and recommended mitigation strategies.

Vulnerability Description

The vulnerability arises from improper input validation in the ejs package, allowing attackers to inject and execute arbitrary OS commands within the server-side templates.

Affected Systems and Versions

The ejs package version 3.1.6 for Node.js is confirmed to be affected by this vulnerability. Users with this version installed are urged to take immediate action to secure their systems.

Exploitation Mechanism

Attackers can craft malicious payloads to exploit the outputFunctionName setting, enabling them to execute arbitrary OS commands during the template compilation process, leading to potential RCE.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2022-29078, users are advised to follow these security measures:

Immediate Steps to Take

Update the ejs package to a non-vulnerable version.
Implement input validation mechanisms to prevent malicious template injections.
Monitor network traffic and system logs for any signs of suspicious activity.

Long-Term Security Practices

Regularly audit and update dependencies to address known security vulnerabilities.
Educate development teams on secure coding practices and the risks associated with server-side template injections.

Patching and Updates

Stay informed about security advisories and patches released by the ejs package maintainers. Promptly apply updates to mitigate the risk of exploitation.