CVE-2023-47104
📋 TL;DR
This vulnerability in tinyfiledialogs allows shell command injection through insufficient input sanitization of shell metacharacters in dialog titles and messages. Attackers can execute arbitrary commands on systems running vulnerable versions. Any application using tinyfiledialogs before version 3.15.0 is affected.
💻 Affected Systems
- tinyfiledialogs (tiny file dialogs)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution leading to data theft, ransomware deployment, or complete system takeover.
Likely Case
Local privilege escalation or arbitrary command execution in the context of the vulnerable application.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only denial of service.
🎯 Exploit Status
Exploitation requires user interaction with dialog boxes but is technically simple once triggered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.15.0 and later
Vendor Advisory: https://sourceforge.net/p/tinyfiledialogs/code/ci/ac9f9f6d8cdf45ca8d9b4cf1f201ee472301e114/
Restart Required: Yes
Instructions:
1. Update tinyfiledialogs to version 3.15.0 or later. 2. Recompile any applications using the library. 3. Restart affected applications.
🔧 Temporary Workarounds
Input Sanitization
allImplement strict input validation to filter shell metacharacters before passing data to tinyfiledialogs functions.
Implement regex filtering: [^a-zA-Z0-9\s\-\.\,\!\?\@\#\$\%\^\&\*\(\)\[\]\{\}\|\;\:\'\"\<\>\/\\\+\=\_\~\`]
🧯 If You Can't Patch
- Implement application-level input validation to strip or escape shell metacharacters before calling tinyfiledialogs functions.
- Run applications with minimal privileges and in sandboxed environments to limit potential damage.
🔍 How to Verify
Check if Vulnerable:
Check if application uses tinyfiledialogs library version < 3.15.0 by examining dependencies or build configurations.Check Version:
Check library headers or version strings in compiled binaries; no universal command available.Verify Fix Applied:
Verify tinyfiledialogs version is 3.15.0 or later in application dependencies or library files.📡 Detection & Monitoring
Log Indicators:
- Unusual process spawns from dialog-related applications
- Shell command execution patterns from GUI applications
Network Indicators:
- Outbound connections from dialog applications to unexpected destinations
SIEM Query:
Process creation where parent process is known dialog application and command contains metacharacters like backticks or dollar signs🔗 References
- https://github.com/servo/servo/issues/25498#issuecomment-703527082
- https://sourceforge.net/p/tinyfiledialogs/code/ci/ac9f9f6d8cdf45ca8d9b4cf1f201ee472301e114/
- https://github.com/servo/servo/issues/25498#issuecomment-703527082
- https://sourceforge.net/p/tinyfiledialogs/code/ci/ac9f9f6d8cdf45ca8d9b4cf1f201ee472301e114/
