CVE-2021-29452 : Vulnerability Insights and Analysis

Any logged in user could edit any other logged in user.

Understanding CVE-2021-29452

This CVE affects the 'a12n-server' npm package developed by Curveball. The vulnerability allowed any logged-in user to edit other users, bypassing intended admin privileges.

What is CVE-2021-29452?

CVE-2021-29452 is a security vulnerability in the a12n-server npm package, which incorrectly checked privileges, enabling unauthorized users to edit any other logged-in user.

The Impact of CVE-2021-29452

The impact of this vulnerability is rated as high, with a CVSS base score of 8.1. It poses a risk to confidentiality, integrity, and the overall security of affected systems.

Technical Details of CVE-2021-29452

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

In version 0.18.0 of a12n-server, a new HAL-Form was added to allow editing users, which should have only been accessible to admins. However, incorrect privilege checks permitted any logged-in user to perform this action, circumventing security protocols. The issue was addressed in version 0.18.2.

Affected Systems and Versions

The vulnerability affects a12n-server versions greater than or equal to 0.18 and less than 0.18.2.

Exploitation Mechanism

Attackers could exploit this vulnerability by simply being logged in to the system, allowing them to edit any other logged-in user without requiring special privileges.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-29452, immediate steps need to be taken, along with the implementation of long-term security practices and regular patching.

Immediate Steps to Take

Users are advised to update their a12n-server npm packages to version 0.18.2 or newer to prevent exploitation of this vulnerability.

Long-Term Security Practices

Incorporate proper privilege management practices, conduct regular security assessments, and ensure that access control mechanisms are correctly implemented to prevent unauthorized actions.

Patching and Updates

Stay informed about security advisories and updates from Curveball, and promptly apply patches to address known vulnerabilities.