CVE-2025-63435
📋 TL;DR
The Xtooltech Xtool AnyScan Android application version 4.40.40 has a missing authentication vulnerability in its update server endpoint. This allows unauthenticated remote attackers to download official update packages, potentially enabling supply chain attacks or reverse engineering. All users of the affected application version are vulnerable.
💻 Affected Systems
- Xtooltech Xtool AnyScan Android Application
📦 What is this software?
Xtool Anyscan by Xtooltech
⚠️ Risk & Real-World Impact
Worst Case
Attackers could download update packages, analyze them for additional vulnerabilities, modify them with malicious code, and distribute them to users, leading to remote code execution or data theft.
Likely Case
Attackers download official update packages to analyze the application's code and functionality, potentially discovering additional vulnerabilities or proprietary information.
If Mitigated
With proper authentication controls, only authorized users can access update packages, preventing unauthorized analysis or tampering.
🎯 Exploit Status
Exploitation requires only HTTP requests to the update endpoint without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Contact Xtooltech for patch availability. 2. If patch is available, update the application through official channels. 3. Verify the update server now requires authentication.
🔧 Temporary Workarounds
Disable automatic updates
androidPrevent the application from automatically downloading updates that could be compromised.
Navigate to Android Settings > Apps > Xtool AnyScan > Disable 'Auto-update' or similar setting
🧯 If You Can't Patch
- Uninstall the Xtool AnyScan application until a patched version is available.
- Use network filtering to block connections to the Xtool AnyScan update servers.
🔍 How to Verify
Check if Vulnerable:
Attempt to access the update endpoint via HTTP request without authentication. If update packages are downloadable, the system is vulnerable.Check Version:
Open Xtool AnyScan app > Settings > About or similar menu to check version number.Verify Fix Applied:
Attempt to access the update endpoint via HTTP request without authentication. If access is denied or requires authentication, the fix is applied.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP GET requests to update server endpoints from unauthorized IP addresses
- Multiple failed authentication attempts followed by successful unauthenticated downloads
Network Indicators:
- HTTP traffic to Xtool AnyScan update servers without authentication headers
- Unusually large downloads from update servers to unexpected IP addresses
SIEM Query:
source_ip=* AND dest_ip=update_server_ip AND http_method=GET AND NOT http_headers CONTAINS 'Authorization'