CVE-2020-12255 : What You Need to Know
Learn about CVE-2020-12255 affecting rConfig 3.9.4, allowing remote code execution through improper file upload validation. Find mitigation steps and long-term security practices.
rConfig 3.9.4 is vulnerable to remote code execution due to improper validation in the file upload functionality. This vulnerability allows an attacker to upload a malicious PHP file and execute arbitrary code.
Understanding CVE-2020-12255
This CVE involves a security flaw in rConfig 3.9.4 that enables remote code execution through a file upload vulnerability.
What is CVE-2020-12255?
The vulnerability in rConfig 3.9.4 allows attackers to upload a PHP file containing arbitrary code, exploiting improper validation in the file upload process.
The Impact of CVE-2020-12255
The vulnerability can lead to remote code execution, enabling attackers to compromise the affected system by uploading malicious PHP files.
Technical Details of CVE-2020-12255
rConfig 3.9.4's vulnerability to remote code execution due to improper validation in the file upload functionality.
Vulnerability Description
- rConfig 3.9.4 allows remote code execution through improper validation in the file upload functionality.
- The issue lies in vendor.crud.php, which accepts file uploads based on content-type without considering file extensions and headers.
- Attackers can exploit this by uploading a .php file to vendor.php containing arbitrary PHP code and changing the content-type to image/gif.
Affected Systems and Versions
- Product: rConfig 3.9.4
- Vendor: Not applicable
- Versions: Not applicable
Exploitation Mechanism
- Attackers can exploit the vulnerability by uploading a PHP file with arbitrary code to vendor.php and changing the content-type to image/gif.
Mitigation and Prevention
Steps to address and prevent the CVE-2020-12255 vulnerability:
Immediate Steps to Take
- Disable file uploads in rConfig if not essential.
- Implement proper input validation and sanitization for uploaded files.
- Regularly monitor and review file upload functionality for security gaps.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing.
- Keep software and systems updated with the latest security patches.
- Educate users on safe file handling practices to prevent malicious uploads.
Patching and Updates
- Apply patches or updates provided by rConfig to fix the vulnerability and enhance system security.