CVE-2018-7486 Explained : Impact and Mitigation

Blue River Mura CMS versions prior to v7.0.7029 contain a vulnerability that allows attackers to execute arbitrary code through improper restrictions on file types and pathnames.

Understanding CVE-2018-7486

Blue River Mura CMS before v7.0.7029 enables inline function calls without proper file type and pathname restrictions, leading to remote code execution.

What is CVE-2018-7486?

The vulnerability in Blue River Mura CMS allows attackers to execute arbitrary code by utilizing specific tags and exploiting file upload features.

The Impact of CVE-2018-7486

This vulnerability permits remote attackers to execute arbitrary code, potentially compromising the integrity and security of the affected systems.

Technical Details of CVE-2018-7486

Blue River Mura CMS vulnerability details and exploitation mechanisms.

Vulnerability Description

Blue River Mura CMS before v7.0.7029 supports inline function calls with insufficient file type and pathname restrictions.
Attackers can execute arbitrary code using specific tags and exploiting file upload functionalities.

Affected Systems and Versions

Affected Version: Blue River Mura CMS prior to v7.0.7029.

Exploitation Mechanism

Attackers can exploit the vulnerability by using [m] and [/m] tags to make inline function calls without proper file type or pathname restrictions.
By employing an [m]$.dspinclude("../pathname/executable.jpeg")[/m] approach, where executable.jpeg contains malicious code, attackers can execute arbitrary code.
The exploit can be combined with CKFinder's file upload feature.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2018-7486.

Immediate Steps to Take

Update Blue River Mura CMS to version v7.0.7029 or later to patch the vulnerability.
Implement proper input validation and sanitization to prevent code execution through user inputs.

Long-Term Security Practices

Regularly monitor and audit file uploads and inline function calls within the CMS.
Educate users on secure coding practices and the risks associated with improper file handling.

Patching and Updates

Apply security patches and updates provided by Blue River Mura CMS promptly to address known vulnerabilities.