CVE-2025-15068
📋 TL;DR
This CVE describes a missing authorization vulnerability in Gmission Web Fax that allows attackers to abuse authentication mechanisms and falsify session credentials through manipulation. It affects Web Fax versions from 3.0 up to but not including 3.0.1. Attackers could potentially gain unauthorized access to fax functionality.
💻 Affected Systems
- Gmission Web Fax
📦 What is this software?
Web Fax by Gmission
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the fax system allowing unauthorized users to send/receive faxes, access sensitive documents, and potentially pivot to other systems.
Likely Case
Unauthorized users gaining access to fax functionality to send/receive faxes, potentially exposing sensitive information or incurring costs.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication bypass remains possible.
🎯 Exploit Status
Exploitation requires some authentication but authorization checks can be bypassed through manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.1
Vendor Advisory: https://www.gmission.co.kr/fax1
Restart Required: Yes
Instructions:
1. Download Web Fax version 3.0.1 from vendor website
2. Backup current installation
3. Apply the update according to vendor instructions
4. Restart the Web Fax service
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to Web Fax interface to authorized users only
Authentication Proxy
allPlace Web Fax behind a reverse proxy with additional authentication layer
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the Web Fax interface
- Enable detailed logging and monitoring for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check Web Fax version in administration interface or configuration filesCheck Version:
Check Web Fax admin panel or configuration files for version informationVerify Fix Applied:
Verify version shows 3.0.1 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts
- Session manipulation events
- Unexpected fax transmission logs
Network Indicators:
- Unusual traffic patterns to Web Fax interface
- Authentication bypass attempts
SIEM Query:
source="web_fax_logs" AND (event_type="auth_bypass" OR user="unknown" OR session_id="manipulated")