CVE-2022-26672
📋 TL;DR
ASUS WebStorage contains a hardcoded API token in its source code, allowing unauthenticated remote attackers to connect to the server and attempt logins to user accounts. Successful exploitation enables attackers to access, modify, or delete user account information. This affects all users of vulnerable ASUS WebStorage installations.
💻 Affected Systems
- ASUS WebStorage
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to all user accounts, leading to complete data breach, account takeover, and potential lateral movement within the system.
Likely Case
Attackers compromise individual user accounts to steal personal data, modify account settings, or delete user information.
If Mitigated
With proper network segmentation and monitoring, impact is limited to isolated user account compromises rather than system-wide breaches.
🎯 Exploit Status
Exploitation requires only the hardcoded token and basic API knowledge; no advanced skills needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check ASUS advisory for specific patched version
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-6041-7bd67-1.html
Restart Required: Yes
Instructions:
1. Check ASUS advisory for latest patched version. 2. Update ASUS WebStorage to the patched version. 3. Restart the service. 4. Rotate all user credentials as precaution.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to ASUS WebStorage to trusted IPs only
Use firewall rules to limit inbound connections to specific IP ranges
API Token Rotation
allManually replace hardcoded API token with new secure token
Modify application source code to replace hardcoded token with secure random token
🧯 If You Can't Patch
- Disable ASUS WebStorage service until patching is possible
- Implement strict network access controls and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Inspect application source code for hardcoded API tokens or attempt authentication using known hardcoded credentialsCheck Version:
Check ASUS WebStorage application settings or documentation for version informationVerify Fix Applied:
Verify application version matches patched version and test that hardcoded token no longer works for authentication📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single source
- Successful logins using API token from unexpected sources
- Unusual account access patterns
Network Indicators:
- API calls using hardcoded token from unauthorized IPs
- Unusual authentication traffic patterns
SIEM Query:
source_ip=* AND (event_type="authentication" AND token="hardcoded_token_value") OR (failed_logins > threshold)