CVE-2021-39211 Explained : Impact and Mitigation

GLPI is a free Asset and IT management software package. This vulnerability, tracked as CVE-2021-39211, involves the disclosure of GLPI and server information in the telemetry endpoint prior to version 9.5.6.

Understanding CVE-2021-39211

This section will provide insights into the vulnerability and its impact.

What is CVE-2021-39211?

CVE-2021-39211 is a vulnerability in GLPI versions prior to 9.5.6 that allows unauthorized disclosure of sensitive information through the telemetry endpoint. This issue has a CVSS base score of 5.3, categorizing it as a medium severity vulnerability.

The Impact of CVE-2021-39211

The disclosure of GLPI and server information can lead to various security risks for users and organizations, including potential exposure of sensitive data to unauthorized actors.

Technical Details of CVE-2021-39211

Explore the technical aspects of the vulnerability.

Vulnerability Description

The telemetry endpoint in GLPI versions before 9.5.6 exposes information that could be exploited by attackers to gather sensitive data.

Affected Systems and Versions

Product: GLPI
Vendor: glpi-project
Versions Affected: >= 9.2, < 9.5.6

Exploitation Mechanism

Unauthorized actors can exploit this vulnerability by accessing the telemetry endpoint to obtain confidential information about the GLPI software and server.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-39211.

Immediate Steps to Take

Update GLPI to version 9.5.6 to fix the vulnerability.
As a temporary workaround, remove the file

ajax/telemetry.php

from the GLPI installation, as it is unnecessary for standard GLPI functions.

Long-Term Security Practices

Regularly update software and monitor for security advisories.
Implement access controls and restrict public visibility of sensitive endpoints.

Patching and Updates

Ensure timely installation of security patches and updates to address known vulnerabilities in GLPI.