CVE-2020-21483 : Security Advisory and Response
Learn about CVE-2020-21483, an arbitrary file upload vulnerability in Jizhicms v1.5 that allows attackers to execute arbitrary code via a crafted .jpg file converted to a PHP file. Find mitigation steps and prevention measures.
An arbitrary file upload vulnerability in Jizhicms v1.5 allows attackers to execute arbitrary code via a crafted .jpg file which is later changed to a PHP file.
Understanding CVE-2020-21483
This CVE describes a critical vulnerability in Jizhicms v1.5 that enables attackers to upload malicious files and execute arbitrary code.
What is CVE-2020-21483?
This CVE refers to an arbitrary file upload vulnerability in Jizhicms v1.5, allowing threat actors to upload a specially crafted .jpg file that can be later converted to a PHP file for code execution.
The Impact of CVE-2020-21483
The vulnerability poses a severe risk as attackers can exploit it to execute arbitrary code on the affected system, potentially leading to unauthorized access, data theft, or system compromise.
Technical Details of CVE-2020-21483
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability in Jizhicms v1.5 allows attackers to upload a malicious .jpg file, which can be converted to a PHP file, enabling the execution of arbitrary code on the server.
Affected Systems and Versions
- Product: Jizhicms
- Version: 1.5
- Status: Affected
Exploitation Mechanism
Attackers exploit this vulnerability by uploading a specially crafted .jpg file, leveraging the file conversion to PHP to execute malicious code.
Mitigation and Prevention
It is crucial to take immediate action to mitigate the risks associated with CVE-2020-21483.
Immediate Steps to Take
- Disable file uploads in Jizhicms if not essential for operations.
- Implement file type validation to restrict uploads to safe formats.
- Monitor file uploads for suspicious activity.
Long-Term Security Practices
- Regularly update Jizhicms to the latest version to patch known vulnerabilities.
- Conduct security audits to identify and address potential security weaknesses.
- Educate users on safe file handling practices to prevent similar incidents.
Patching and Updates
Ensure timely installation of security patches and updates provided by Jizhicms to address the vulnerability and enhance system security.