CVE-2023-37646
📋 TL;DR
This vulnerability in Bitberry File Opener v23.0 allows attackers to perform directory traversal attacks through CAB file extraction. Attackers can write arbitrary files outside the intended extraction directory, potentially leading to remote code execution. All users of the affected version are vulnerable when processing malicious CAB files.
💻 Affected Systems
- Bitberry File Opener
📦 What is this software?
File Opener by Bitberry
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with system-level privileges, allowing complete system compromise, data theft, and lateral movement.
Likely Case
Arbitrary file write leading to privilege escalation, configuration file modification, or planting of persistent backdoors.
If Mitigated
Limited to file writes in user-controlled directories if proper sandboxing and file permission restrictions are enforced.
🎯 Exploit Status
Exploitation requires user to open a malicious CAB file. Public proof-of-concept demonstrates directory traversal.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://bitberry.com
Restart Required: No
Instructions:
1. Check vendor website for updated version
2. Uninstall vulnerable version
3. Install patched version if available
4. Verify CAB file extraction is restricted to intended directories
🔧 Temporary Workarounds
Disable CAB file handling
allRemove or modify file associations to prevent Bitberry File Opener from processing CAB files
Use alternative file opener
allConfigure system to use a different, patched application for CAB file extraction
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized binaries
- Deploy endpoint detection and response (EDR) to monitor for suspicious file write operations
🔍 How to Verify
Check if Vulnerable:
Check application version in settings/about dialog. If version is 23.0, system is vulnerable.Check Version:
Check application GUI or installation directory for version informationVerify Fix Applied:
Test with known malicious CAB file payload and verify files cannot be written outside extraction directory.📡 Detection & Monitoring
Log Indicators:
- File write operations outside expected extraction directories
- CAB file processing errors with path traversal patterns
Network Indicators:
- Download of CAB files from untrusted sources
- Unusual outbound connections after CAB file processing
SIEM Query:
process_name:"bitberry" AND file_write:*\..\* OR file_write:*../*