CVE-2025-67230
📋 TL;DR
This vulnerability in ToDesktop Builder v0.33.0 allows attackers with renderer-context access to bypass validation and invoke external protocol handlers via the Custom URL Scheme. This could enable arbitrary command execution or data exfiltration. Users of ToDesktop Builder v0.33.0 are affected.
💻 Affected Systems
- ToDesktop Builder
📦 What is this software?
Builder by Todesktop
⚠️ Risk & Real-World Impact
Worst Case
Attackers could execute arbitrary system commands, install malware, or exfiltrate sensitive data from the victim's system.
Likely Case
Attackers could launch malicious applications or scripts, potentially leading to further system compromise.
If Mitigated
With proper sandboxing and least-privilege execution, impact would be limited to the application's context.
🎯 Exploit Status
Exploitation requires renderer-context access, which typically means the attacker already has some foothold in the application.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.34.0 or later
Vendor Advisory: https://www.todesktop.com/security/advisories/TDSA-2025-002
Restart Required: Yes
Instructions:
1. Update ToDesktop Builder to v0.34.0 or later. 2. Rebuild any applications created with the vulnerable version. 3. Distribute updated applications to end users.
🔧 Temporary Workarounds
Disable Custom URL Scheme
allRemove or disable the Custom URL Scheme feature in application configuration.
Application Sandboxing
allRun applications in restricted environments or sandboxes to limit protocol handler access.
🧯 If You Can't Patch
- Isolate affected applications in network segments with limited external access.
- Implement application allowlisting to prevent execution of unauthorized external handlers.
🔍 How to Verify
Check if Vulnerable:
Check if ToDesktop Builder version is 0.33.0 in application settings or via 'todesktop --version' command.Check Version:
todesktop --versionVerify Fix Applied:
Confirm version is 0.34.0 or later and verify Custom URL Scheme handler has proper permission validation.📡 Detection & Monitoring
Log Indicators:
- Unexpected protocol handler invocations from ToDesktop applications
- External process launches from application context
Network Indicators:
- Outbound connections to unexpected protocols or services initiated by application
SIEM Query:
process_name:"todesktop" AND (event_type:"process_creation" OR event_type:"network_connection")