CVE-2021-28976 Explained : Impact and Mitigation
Learn about CVE-2021-28976, a Remote Code Execution vulnerability in GetSimpleCMS before version 3.3.16 via phar files. Understand the impact, affected systems, exploitation, and mitigation steps.
Get to know the details of CVE-2021-28976, a Remote Code Execution vulnerability found in GetSimpleCMS before version 3.3.16 in admin/upload.php via phar files.
Understanding CVE-2021-28976
This section will provide an in-depth analysis of the CVE-2021-28976 vulnerability.
What is CVE-2021-28976?
CVE-2021-28976 is a Remote Code Execution vulnerability discovered in GetSimpleCMS before version 3.3.16, specifically in the admin/upload.php file via phar files.
The Impact of CVE-2021-28976
This vulnerability may allow an attacker to execute arbitrary code remotely, leading to potential unauthorized access and control of the affected system.
Technical Details of CVE-2021-28976
Explore the technical aspects of CVE-2021-28976 in this section.
Vulnerability Description
The vulnerability arises due to improper validation of user-supplied input in the processing of phar files, potentially enabling malicious actors to execute arbitrary code.
Affected Systems and Versions
GetSimpleCMS versions prior to 3.3.16 are affected by this vulnerability. Users with vulnerable versions are at risk of exploitation.
Exploitation Mechanism
Exploiting this vulnerability involves crafting malicious phar files and uploading them via the admin/upload.php script, which, when executed, could lead to remote code execution.
Mitigation and Prevention
Learn about the necessary steps to mitigate the risks posed by CVE-2021-28976.
Immediate Steps to Take
Users are advised to update GetSimpleCMS to version 3.3.16 or later to prevent exploitation of this vulnerability. Additionally, avoid uploading phar files from untrusted sources.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and staying informed about security updates can enhance the overall security posture of systems.
Patching and Updates
Regularly check for security updates released by GetSimpleCMS and promptly apply patches to ensure that known vulnerabilities like CVE-2021-28976 are addressed.