CVE-2018-20420 : What You Need to Know
Discover the security flaw in webERP 4.15's Z_CreateCompanyTemplateFile.php, allowing unauthorized file overwrites. Learn about the impact, technical details, and mitigation steps.
This CVE-2018-20420 article provides insights into a security vulnerability in webERP 4.15's Z_CreateCompanyTemplateFile.php, leading to Incorrect Access Control and potential file overwrite.
Understanding CVE-2018-20420
This CVE involves a specific issue in webERP 4.15 that allows for the overwrite of existing .sql files on a targeted website through directory traversal.
What is CVE-2018-20420?
The vulnerability in Z_CreateCompanyTemplateFile.php in webERP 4.15 enables attackers to overwrite .sql files on a website by exploiting directory traversal in the TemplateName parameter.
The Impact of CVE-2018-20420
The security flaw can result in unauthorized access and modification of critical files on the affected website, potentially leading to data loss or manipulation.
Technical Details of CVE-2018-20420
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from Incorrect Access Control in webERP 4.15, allowing malicious actors to overwrite existing .sql files by manipulating the TemplateName parameter.
Affected Systems and Versions
- Product: webERP 4.15
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
The exploit involves creating a template and utilizing directory traversal ("../") in the TemplateName parameter to overwrite targeted .sql files.
Mitigation and Prevention
Protecting systems from CVE-2018-20420 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable access to vulnerable files and directories.
- Implement input validation to prevent directory traversal attacks.
- Monitor file changes and access logs for suspicious activities.
Long-Term Security Practices
- Regularly update webERP to the latest secure version.
- Conduct security audits and penetration testing to identify vulnerabilities.
- Educate users on secure coding practices and the risks of directory traversal attacks.
Patching and Updates
- Apply patches provided by webERP to address the Incorrect Access Control vulnerability.