CVE-2021-26804 : Exploit Details and Defense Strategies
Learn about CVE-2021-26804 involving insecure permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allowing remote attackers to bypass validation by uploading files with modified extensions.
A detailed overview of CVE-2021-26804 highlighting the vulnerability in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 that allows remote attackers to bypass validation.
Understanding CVE-2021-26804
This section will cover the vulnerability details, impact, affected systems, exploitation mechanism, and mitigation steps.
What is CVE-2021-26804?
The CVE-2021-26804 vulnerability involves insecure permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2. It enables remote attackers to bypass validation by changing file extensions to ".gif" and uploading them to the "Administration/ Parameters/ Images" section.
The Impact of CVE-2021-26804
The vulnerability allows malicious actors to evade validation checks, potentially leading to unauthorized access, data breaches, or further exploitation of the application.
Technical Details of CVE-2021-26804
Examining the specifics of the vulnerability including its description, affected systems, versions, and exploitation methods.
Vulnerability Description
The flaw in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 permits remote attackers to upload malicious files disguised as ".gif", bypassing validation protocols.
Affected Systems and Versions
Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 are impacted by this vulnerability, exposing them to potential exploitation.
Exploitation Mechanism
Attackers can exploit this vulnerability by simply altering file extensions to ".gif" and uploading them via the application's "Administration/ Parameters/ Images" section.
Mitigation and Prevention
Guidelines on immediate steps to mitigate risk, and long-term security practices to enhance system defenses.
Immediate Steps to Take
Users should apply security patches promptly, monitor file uploads, and restrict file permissions to prevent unauthorized uploads.
Long-Term Security Practices
Regular security assessments, user training on safe file handling, and implementing least privilege access control are recommended practices.
Patching and Updates
Ensure timely installation of security patches provided by Centreon to address the CVE-2021-26804 vulnerability.