CVE-2023-29804
📋 TL;DR
CVE-2023-29804 is a command injection vulnerability in WFS-SR03 v1.0.3 that allows attackers to execute arbitrary commands on affected devices via the sys_smb_pwdmod function. This affects organizations using WFS-SR03 devices for network storage or file sharing. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- WFS-SR03
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary commands, install malware, pivot to other systems, and maintain persistent access.
Likely Case
Unauthorized command execution leading to data theft, service disruption, or installation of backdoors for future attacks.
If Mitigated
Limited impact if proper network segmentation, input validation, and least privilege principles are implemented.
🎯 Exploit Status
Exploitation requires access to the SMB password modification function. Public details available in referenced links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check vendor website for firmware updates. 2. If update available, download and apply following vendor instructions. 3. Verify fix by testing the vulnerable function.
🔧 Temporary Workarounds
Disable SMB Service
allTemporarily disable SMB file sharing services if not required
Check device web interface for SMB service toggle
Network Segmentation
allIsolate WFS-SR03 devices from critical networks
Configure firewall rules to restrict access to device management interface
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the device management interface
- Monitor device logs for suspicious SMB password modification attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH. If version is v1.0.3, device is vulnerable.Check Version:
Check device web interface at System > Firmware or use vendor-specific CLI commandsVerify Fix Applied:
Test the sys_smb_pwdmod function with malicious input after applying any updates or workarounds.📡 Detection & Monitoring
Log Indicators:
- Unusual SMB password modification attempts
- Command execution patterns in system logs
- Failed authentication attempts to device management
Network Indicators:
- Unexpected outbound connections from device
- SMB protocol anomalies
- Traffic to/from device management port
SIEM Query:
source="WFS-SR03" AND (event="password_modification" OR cmd="*" OR process="unusual")