CVE-2021-39209 : Exploit Details and Defense Strategies

GLPI is a free Asset and IT management software package. In versions prior to 9.5.6, a user who is logged in to GLPI can bypass Cross-Site Request Forgery (CSRF) protection, which could lead to various malicious actions. This vulnerability has been fixed in version 9.5.6.

Understanding CVE-2021-39209

This section provides an in-depth look at the details of CVE-2021-39209.

What is CVE-2021-39209?

CVE-2021-39209 relates to a bypassable CSRF protection vulnerability in GLPI software versions before 9.5.6. It allows a logged-in user to bypass CSRF protection, potentially enabling malicious activities.

The Impact of CVE-2021-39209

The vulnerability has a CVSS v3.1 base score of 8.8, indicating a high severity issue with impacts on confidentiality, integrity, and availability. The attack complexity is low, and user interaction is not required.

Technical Details of CVE-2021-39209

Let's delve into the technical aspects of CVE-2021-39209.

Vulnerability Description

The vulnerability allows an authenticated user to bypass CSRF protection, leading to unauthorized actions within GLPI.

Affected Systems and Versions

Product: glpi
Vendor: glpi-project
Affected Versions: < 9.5.6

Exploitation Mechanism

The exploit involves a logged-in user bypassing CSRF protections, enabling them to perform unauthorized actions within the software.

Mitigation and Prevention

Learn how to mitigate and prevent issues related to CVE-2021-39209.

Immediate Steps to Take

Upgrade GLPI to version 9.5.6 to eliminate the vulnerability.

Long-Term Security Practices

Enforce strict access controls and user permissions within GLPI.
Regularly monitor and audit user activities to detect any suspicious behavior.

Patching and Updates

Ensure timely installation of software updates and patches to address known vulnerabilities.