CVE-2022-50687
📋 TL;DR
CVE-2022-50687 is a buffer overflow vulnerability in Cobian Backup 11 Gravity that allows attackers to crash the application by pasting a specially crafted 800-byte buffer into the FTP password field. This affects users of Cobian Backup 11 Gravity version 11.2.0.582, resulting in denial of service and potential data loss during backup operations.
💻 Affected Systems
- Cobian Backup 11 Gravity
📦 What is this software?
Backup 11 by Cobiansoft
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash leading to failed backup operations, potential data corruption if crash occurs during active backup, and service disruption requiring manual restart.
Likely Case
Application crash requiring manual restart, temporary disruption of backup services, and potential missed backup windows.
If Mitigated
Minimal impact with proper access controls preventing unauthorized users from accessing the FTP configuration interface.
🎯 Exploit Status
Exploit requires access to the application's configuration interface and ability to paste content into the FTP password field. Proof of concept is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.2.0.583 or later
Vendor Advisory: https://www.cobiansoft.com/
Restart Required: Yes
Instructions:
1. Download latest version from cobiansoft.com. 2. Run installer to upgrade. 3. Restart Cobian Backup service. 4. Verify version shows 11.2.0.583 or higher.
🔧 Temporary Workarounds
Restrict Application Access
windowsLimit access to Cobian Backup configuration interface to authorized administrators only
Input Validation
windowsImplement application-level input validation for FTP password field
🧯 If You Can't Patch
- Restrict physical and network access to systems running vulnerable Cobian Backup
- Implement monitoring for application crashes and unauthorized configuration changes
🔍 How to Verify
Check if Vulnerable:
Check Help > About in Cobian Backup interface for version 11.2.0.582Check Version:
Not applicable - check via application GUI Help > About menuVerify Fix Applied:
Verify version shows 11.2.0.583 or higher in Help > About📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected service termination events
- Failed backup job entries
Network Indicators:
- Unusual FTP configuration changes if monitored
SIEM Query:
EventID: 1000 Application Error for cobian.exe OR EventID: 7034 Service terminated unexpectedly for Cobian Backup