CVE-2018-6383 : Security Advisory and Response
Learn about CVE-2018-6383, a vulnerability in Monstra CMS up to version 3.0.4 that allows remote authenticated Admins or Editors to execute arbitrary PHP code by uploading specific files.
Monstra CMS up to version 3.0.4 is vulnerable to remote code execution due to an incomplete list of forbidden file extensions.
Understanding CVE-2018-6383
Monstra CMS version up to 3.0.4 has a security flaw that allows remote authenticated Admins or Editors to execute arbitrary PHP code by uploading a specific file.
What is CVE-2018-6383?
The vulnerability in Monstra CMS version up to 3.0.4 arises from an incomplete list of forbidden file extensions, enabling the execution of arbitrary PHP code by uploading certain files.
The Impact of CVE-2018-6383
This vulnerability allows remote authenticated Admins or Editors to execute arbitrary PHP code, potentially leading to unauthorized access, data breaches, and system compromise.
Technical Details of CVE-2018-6383
Monstra CMS version up to 3.0.4 is susceptible to remote code execution due to the incomplete list of forbidden file extensions.
Vulnerability Description
The flaw in Monstra CMS version up to 3.0.4 allows remote authenticated users to upload files with .pht or .phar extensions, leading to the execution of arbitrary PHP code.
Affected Systems and Versions
- Product: Monstra CMS
- Vendor: N/A
- Versions affected: Up to 3.0.4
Exploitation Mechanism
Remote authenticated Admins or Editors can exploit this vulnerability by uploading a file with a specific extension, such as .pht or .phar, to execute arbitrary PHP code.
Mitigation and Prevention
To address CVE-2018-6383, users should take immediate steps and implement long-term security practices.
Immediate Steps to Take
- Update Monstra CMS to the latest version that includes a patch for this vulnerability.
- Restrict file upload permissions for Admins and Editors to mitigate the risk of executing arbitrary PHP code.
Long-Term Security Practices
- Regularly monitor and audit file uploads on the CMS to detect any suspicious activities.
- Educate users on safe file upload practices and the risks associated with executing unauthorized code.
Patching and Updates
- Apply security patches provided by Monstra CMS promptly to fix the vulnerability and prevent exploitation.