CVE-2025-15070
📋 TL;DR
This vulnerability in Gmission Web Fax allows unauthorized actors to access sensitive information due to missing authorization checks. It affects Web Fax versions 3.0 through 3.0.1, enabling authentication abuse where attackers can bypass proper authentication mechanisms.
💻 Affected Systems
- Gmission Web Fax
📦 What is this software?
Web Fax by Gmission
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to sensitive fax data, user credentials, or administrative functions, potentially leading to data exfiltration or system compromise.
Likely Case
Unauthorized access to fax content, user information, or system metadata that should be protected by authentication.
If Mitigated
Limited exposure of non-critical information or metadata if proper network segmentation and access controls are implemented.
🎯 Exploit Status
CWE-200 suggests information exposure, combined with authentication abuse indicates relatively straightforward exploitation once identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.1 or later
Vendor Advisory: https://www.gmission.co.kr/fax1
Restart Required: Yes
Instructions:
1. Download Web Fax version 3.0.1 or later from vendor. 2. Backup current installation. 3. Apply update following vendor instructions. 4. Restart Web Fax service. 5. Verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to Web Fax interface to authorized IP addresses only
Authentication Layer Enhancement
allImplement additional authentication layer (e.g., VPN, reverse proxy with auth)
🧯 If You Can't Patch
- Isolate Web Fax system on separate network segment with strict firewall rules
- Implement comprehensive logging and monitoring for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check Web Fax version in administration interface or configuration files. If version is 3.0 exactly, system is vulnerable.Check Version:
Check web interface admin panel or configuration files for version informationVerify Fix Applied:
Verify version is 3.0.1 or later in administration interface and test authentication requirements for sensitive endpoints.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to sensitive endpoints
- Authentication bypass patterns in access logs
- Access to admin functions from unauthenticated IPs
Network Indicators:
- HTTP requests to sensitive endpoints without proper authentication headers
- Access to /admin or /api endpoints from unauthorized sources
SIEM Query:
source="web_fax_logs" AND (url="*/sensitive/*" OR url="*/admin/*") AND NOT (user!="anonymous" OR auth_success="true")