CVE-2017-11178 : Security Advisory and Response

FineCMS before 2017-07-11 allows remote attackers to write to files without authorization, posing a security risk.

Understanding CVE-2017-11178

This CVE describes a vulnerability in FineCMS that enables attackers to overwrite files by manipulating parameters.

What is CVE-2017-11178?

The vulnerability in FineCMS before 2017-07-11 allows remote attackers to write to files without proper authorization.
Attackers can exploit the vulnerability by manipulating the contents and filename parameters within a route=style action.
The lack of file extension validation permits attackers to overwrite various files, including .php files.

The Impact of CVE-2017-11178

Remote attackers can exploit this vulnerability to write to arbitrary files, potentially leading to unauthorized access and data manipulation.

Technical Details of CVE-2017-11178

FineCMS through 2017-07-11 is susceptible to this vulnerability.

Vulnerability Description

The vulnerability resides in the application/core/controller/style.php file.
Attackers can abuse this flaw to write to arbitrary files by manipulating specific parameters.

Affected Systems and Versions

FineCMS versions before 2017-07-11 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the contents and filename parameters within a route=style action.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2017-11178.

Immediate Steps to Take

Update FineCMS to a version beyond 2017-07-11 to eliminate this vulnerability.
Implement strict file permission settings to restrict unauthorized file modifications.

Long-Term Security Practices

Regularly monitor and audit file changes and permissions within the application.
Educate users on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply patches and updates provided by FineCMS to address this vulnerability effectively.