CVE-2018-7556 Explained : Impact and Mitigation

LimeSurvey versions 2.6.x before 2.6.7, 2.7x.x before 2.73.1, and 3.x before 3.4.2 are vulnerable to remote attackers gaining access to the configuration file through a specific file after the installation process.

Understanding CVE-2018-7556

This CVE entry highlights a security vulnerability in LimeSurvey versions that could lead to unauthorized access to sensitive configuration files.

What is CVE-2018-7556?

The vulnerability in the application/controller/InstallerController.php file of LimeSurvey versions allows remote attackers to exploit the system and access the configuration file post-installation.

The Impact of CVE-2018-7556

This vulnerability could result in unauthorized access to critical configuration files, potentially leading to further system compromise or data breaches.

Technical Details of CVE-2018-7556

LimeSurvey versions 2.6.x before 2.6.7, 2.7x.x before 2.73.1, and 3.x before 3.4.2 are affected by this security issue.

Vulnerability Description

The vulnerability arises from mishandling the InstallerController.php file after installation, enabling attackers to access the configuration file remotely.

Affected Systems and Versions

LimeSurvey 2.6.x versions prior to 2.6.7
LimeSurvey 2.7x.x versions prior to 2.73.1
LimeSurvey 3.x versions prior to 3.4.2

Exploitation Mechanism

Attackers can exploit the vulnerability in the application/controller/InstallerController.php file to gain unauthorized access to the configuration file.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Update LimeSurvey to the latest version that includes a patch for this vulnerability.
Monitor system logs for any suspicious activities.
Restrict access to sensitive files and directories.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Conduct security audits and penetration testing to identify and address weaknesses.
Educate users and administrators about secure practices to mitigate risks.

Patching and Updates

Ensure timely installation of security patches and updates provided by LimeSurvey to address this vulnerability.