CVE-2019-13973 : Security Advisory and Response
Learn about CVE-2019-13973, a vulnerability in LayerBB 1.1.3 allowing arbitrary file uploads, potentially leading to unauthorized access. Find mitigation steps and long-term security practices here.
LayerBB 1.1.3 is susceptible to an arbitrary file upload vulnerability due to the absence of restrictions on the custom_logo filename suffix, enabling the use of .php files.
Understanding CVE-2019-13973
This CVE entry describes a security flaw in LayerBB 1.1.3 that allows malicious actors to upload arbitrary files through the admin/general.php file.
What is CVE-2019-13973?
The vulnerability in LayerBB 1.1.3 permits the upload of malicious files, including .php files, due to the lack of proper restrictions on the custom_logo filename suffix.
The Impact of CVE-2019-13973
This vulnerability can be exploited by attackers to upload and execute arbitrary PHP files, potentially leading to unauthorized access, data theft, or further compromise of the affected system.
Technical Details of CVE-2019-13973
LayerBB 1.1.3 is affected by an arbitrary file upload vulnerability that can be exploited through the admin/general.php file.
Vulnerability Description
The flaw arises from the absence of restrictions on the custom_logo filename suffix, allowing the upload of .php files.
Affected Systems and Versions
- Product: LayerBB 1.1.3
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
Attackers can leverage the vulnerability by uploading malicious .php files through the admin/general.php file.
Mitigation and Prevention
To address CVE-2019-13973, users and administrators should take immediate steps and implement long-term security practices.
Immediate Steps to Take
- Disable file uploads in the affected admin/general.php file.
- Implement proper input validation and file type restrictions.
- Monitor file uploads for suspicious activity.
Long-Term Security Practices
- Regularly update and patch the LayerBB software to mitigate known vulnerabilities.
- Conduct security audits and penetration testing to identify and address potential security weaknesses.
Patching and Updates
Ensure that the LayerBB software is updated to the latest version that includes a fix for the arbitrary file upload vulnerability.