CVE-2021-46386 Explained : Impact and Mitigation
Learn about CVE-2021-46386, a file upload flaw in mingSoft MCMS allowing remote code execution. Discover impact, affected versions, exploitation, and mitigation steps.
A file upload vulnerability in mingSoft MCMS through 5.2.5 allows remote attackers to execute arbitrary code.
Understanding CVE-2021-46386
What is CVE-2021-46386?
The CVE-2021-46386 vulnerability is a file upload issue in mingSoft MCMS, enabling remote attackers to execute arbitrary code by using a crafted jspx webshell.
The Impact of CVE-2021-46386
This vulnerability can be exploited remotely, leading to unauthorized execution of arbitrary code on the affected system.
Technical Details of CVE-2021-46386
Vulnerability Description
The vulnerability resides in the FileAction#upload function of mingSoft MCMS through version 5.2.5, allowing attackers to upload a specially crafted jspx webshell to execute malicious code.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: All versions up to 5.2.5
Exploitation Mechanism
The vulnerability is exploited by uploading a malicious jspx webshell, which the application does not properly validate, leading to arbitrary code execution.
Mitigation and Prevention
Immediate Steps to Take
- Disable file upload functionality if not essential.
- Apply strict input validation on file uploads to block malicious payloads.
- Implement file type validation to only allow safe file formats.
Long-Term Security Practices
- Regularly audit and monitor file upload functionalities for unusual activities.
- Educate developers on secure coding practices to prevent such vulnerabilities.
Patching and Updates
- Update to the latest version of mingSoft MCMS to patch the vulnerability and enhance security.