CVE-2018-7771 Explained : Impact and Mitigation

Schneider Electric U.motion Builder software versions before v1.3.4 have a vulnerability that allows for directory traversal remote code execution.

Understanding CVE-2018-7771

This CVE involves a security flaw in Schneider Electric U.motion Builder software versions prior to v1.3.4, enabling unauthorized users to write PHP files in any location within the web service directory tree.

What is CVE-2018-7771?

The vulnerability in editscript.php processing in U.motion Builder Software allows standard users to create PHP files in various directories, posing a security risk.

The Impact of CVE-2018-7771

The vulnerability permits unauthorized users to execute remote code, potentially leading to severe consequences such as data breaches, system compromise, and unauthorized access.

Technical Details of CVE-2018-7771

Schneider Electric U.motion Builder software versions prior to v1.3.4 are susceptible to a directory traversal vulnerability that facilitates remote code execution.

Vulnerability Description

The flaw in editscript.php processing allows standard users to write PHP files in any directory within the web service tree, compromising system integrity.

Affected Systems and Versions

Product: U.Motion
Vendor: Schneider Electric SE
Vulnerable Version: U.motion Builder Software, all versions before v1.3.4

Exploitation Mechanism

The vulnerability enables attackers with regular privileges to exploit directory traversal, writing malicious PHP files in critical directories, potentially leading to unauthorized code execution.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2018-7771.

Immediate Steps to Take

Update U.motion Builder Software to version 1.3.4 or later to eliminate the vulnerability.
Restrict access to the web service directory to authorized personnel only.
Monitor system logs for any suspicious activities indicating a potential exploit.

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments to identify and address any potential weaknesses.
Educate users on secure coding practices and the importance of maintaining up-to-date software versions.

Patching and Updates

Stay informed about security advisories from Schneider Electric SE and promptly apply patches and updates to ensure system security.