CVE-2020-20979 : Exploit Details and Defense Strategies
Learn about CVE-2020-20979, an arbitrary file upload vulnerability in LJCMS v4.3 allowing attackers to execute code. Find mitigation steps and preventive measures.
An arbitrary file upload vulnerability in the move_uploaded_file() function of LJCMS v4.3 allows attackers to execute arbitrary code.
Understanding CVE-2020-20979
This CVE describes a critical arbitrary file upload vulnerability in LJCMS v4.3 that can lead to remote code execution.
What is CVE-2020-20979?
The vulnerability in the move_uploaded_file() function of LJCMS v4.3 allows malicious actors to upload and execute arbitrary code on the affected system.
The Impact of CVE-2020-20979
This vulnerability can result in unauthorized access, data theft, and potential system compromise by executing malicious code remotely.
Technical Details of CVE-2020-20979
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability lies in the move_uploaded_file() function of LJCMS v4.3, enabling attackers to upload and execute arbitrary code.
Affected Systems and Versions
- LJCMS v4.3
Exploitation Mechanism
Attackers can exploit this vulnerability by uploading a malicious file using the move_uploaded_file() function, leading to code execution.
Mitigation and Prevention
Protecting systems from CVE-2020-20979 is crucial to prevent potential security breaches.
Immediate Steps to Take
- Disable file uploads in LJCMS if not essential
- Implement input validation to restrict file types and sizes
- Regularly monitor and review uploaded files for suspicious activities
Long-Term Security Practices
- Keep LJCMS and all related components up to date
- Conduct regular security assessments and penetration testing
- Educate users on safe file upload practices
Patching and Updates
- Apply patches and updates provided by LJCMS to address the vulnerability