CVE-2017-9543 : Security Advisory and Response

EFS Software Easy Chat Server versions 2.0 to 3.1 contain a vulnerability that allows remote attackers to reset passwords via a crafted POST request.

Understanding CVE-2017-9543

What is CVE-2017-9543?

CVE-2017-9543 is a vulnerability found in the register.ghp file of EFS Software Easy Chat Server versions 2.0 to 3.1, enabling attackers to reset passwords remotely.

The Impact of CVE-2017-9543

This vulnerability allows malicious actors to reset passwords of their choice by sending a specifically crafted POST request to the registresult.htm page.

Technical Details of CVE-2017-9543

Vulnerability Description

The register.ghp file in EFS Software Easy Chat Server versions 2.0 to 3.1 allows remote attackers to reset arbitrary passwords through a crafted POST request to registresult.htm.

Affected Systems and Versions

Product: EFS Software Easy Chat Server
Versions: 2.0 to 3.1

Exploitation Mechanism

Attackers exploit this vulnerability by sending a specially crafted POST request to the registresult.htm page, enabling them to reset passwords.

Mitigation and Prevention

Immediate Steps to Take

Disable or restrict access to the register.ghp file.
Implement strong password policies.
Regularly monitor and analyze server logs for suspicious activities.

Long-Term Security Practices

Keep software and systems up to date with the latest security patches.
Conduct regular security audits and penetration testing.
Educate users on safe password practices and phishing awareness.
Employ network and application firewalls to filter and monitor traffic.

Patching and Updates

Ensure that EFS Software Easy Chat Server is updated to a version that addresses the CVE-2017-9543 vulnerability.