CVE-2020-21787 : Vulnerability Insights and Analysis
Learn about CVE-2020-21787, a vulnerability in CRMEB 3.1.0+ allowing File Upload Getshell attacks via UploadService.php. Find mitigation steps and prevention measures.
CRMEB 3.1.0+ is vulnerable to File Upload Getshell via /crmeb/crmeb/services/UploadService.php.
Understanding CVE-2020-21787
CRMEB 3.1.0+ has a vulnerability that allows for File Upload Getshell via a specific service.
What is CVE-2020-21787?
This CVE identifies a vulnerability in CRMEB 3.1.0+ that enables attackers to perform a File Upload Getshell attack through the UploadService.php service.
The Impact of CVE-2020-21787
The vulnerability can lead to unauthorized access and potential exploitation of the affected system, compromising data integrity and confidentiality.
Technical Details of CVE-2020-21787
CRMEB 3.1.0+ vulnerability details.
Vulnerability Description
The vulnerability in CRMEB 3.1.0+ allows attackers to execute a File Upload Getshell attack through the UploadService.php service.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions of CRMEB 3.1.0+
Exploitation Mechanism
Attackers can exploit this vulnerability by uploading malicious files via the specified service, potentially gaining unauthorized access.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2020-21787.
Immediate Steps to Take
- Disable or restrict access to the vulnerable service UploadService.php
- Implement file upload restrictions and validation mechanisms
- Monitor file uploads for suspicious activities
Long-Term Security Practices
- Regularly update and patch CRMEB to the latest secure version
- Conduct security audits and penetration testing to identify vulnerabilities
- Educate users on safe file upload practices
Patching and Updates
- Apply patches or updates provided by the CRMEB vendor to address the vulnerability