CVE-2023-26045 : What You Need to Know

This CVE, assigned by GitHub_M, was published on July 24, 2023, and identifies a vulnerability in NodeBB software that allows for path traversal and code execution through a prototype vulnerability.

Understanding CVE-2023-26045

NodeBB, a Node.js based forum software, is impacted by a path traversal vulnerability that leads to code execution. This vulnerability exists in versions 2.5.0 to 2.8.6 of NodeBB, with a fix implemented in version 2.8.7.

What is CVE-2023-26045?

The vulnerability in NodeBB occurs due to the usage of object destructuring assignment combined with a path traversal flaw. It enables a specially crafted payload to invoke user export logic, leading to the arbitrary execution of JavaScript files on the local disk.

The Impact of CVE-2023-26045

With a CVSS v3.1 severity rating of CRITICAL and a base score of 10, this vulnerability has a high impact. It affects the confidentiality, integrity, and availability of the system, with no privileges required for exploitation.

Technical Details of CVE-2023-26045

In this section, we will explore the specifics of the vulnerability in NodeBB software.

Vulnerability Description

The root cause of this vulnerability lies in the object destructuring assignment syntax used in the user export code path, which when combined with a path traversal weakness, allows for the execution of arbitrary JavaScript files locally.

Affected Systems and Versions

The impacted system is NodeBB software, specifically versions ranging from 2.5.0 to 2.8.6. Users running these versions are vulnerable to path traversal and code execution attacks.

Exploitation Mechanism

Exploiting this vulnerability requires crafting a payload that can trigger the user export logic, ultimately executing malicious JavaScript files on the target system.

Mitigation and Prevention

Protecting systems against CVE-2023-26045 requires immediate action and long-term security practices.

Immediate Steps to Take

Users of NodeBB versions 2.5.0 to 2.8.6 are advised to update to version 2.8.7, where the vulnerability has been patched. Alternatively, site maintainers can manually apply the fix to secure their systems.

Long-Term Security Practices

To enhance overall security posture, organizations should implement secure coding practices, regular security audits, and stay informed about software vulnerabilities and updates.

Patching and Updates

Regularly updating software to the latest versions, applying patches promptly, and monitoring security advisories are crucial steps in mitigating vulnerabilities like CVE-2023-26045.