CVE-2025-3361
📋 TL;DR
CVE-2025-3361 is an unauthenticated OS command injection vulnerability in HGiga iSherlock web service that allows remote attackers to execute arbitrary commands on the server. This affects all organizations using vulnerable versions of iSherlock, potentially exposing their entire server environment to compromise.
💻 Affected Systems
- HGiga iSherlock
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover leading to data exfiltration, ransomware deployment, lateral movement to internal networks, and persistent backdoor installation.
Likely Case
Initial foothold on the server leading to credential harvesting, data theft, and deployment of cryptocurrency miners or botnet clients.
If Mitigated
Limited impact due to network segmentation, minimal privileges, and command execution restrictions, though initial access still achieved.
🎯 Exploit Status
Simple HTTP request with command injection payloads can trigger exploitation. Public proof-of-concept available in CERT advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.1.15 or later
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-10051-76634-1.html
Restart Required: Yes
Instructions:
1. Download latest version from HGiga official website. 2. Backup current configuration. 3. Stop iSherlock service. 4. Install updated version. 5. Restart service and verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to iSherlock web service to trusted IP addresses only
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Application Firewall
allDeploy WAF with OS command injection rules to block exploitation attempts
🧯 If You Can't Patch
- Isolate iSherlock server in separate network segment with strict egress filtering
- Implement application-level input validation and sanitization for all user inputs
🔍 How to Verify
Check if Vulnerable:
Check iSherlock version via web interface or configuration files. Versions before 2025.1.15 are vulnerable.Check Version:
grep -i version /opt/isherlock/config/version.confVerify Fix Applied:
Verify version is 2025.1.15 or later and test with safe command injection payloads that should be rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- HTTP requests containing shell metacharacters like ;, |, &, $()
- Multiple failed authentication attempts followed by command execution
Network Indicators:
- HTTP POST requests to iSherlock endpoints with command injection patterns
- Outbound connections from iSherlock server to unusual destinations
SIEM Query:
source="iSherlock" AND (http_uri="*;*" OR http_uri="*|*" OR http_uri="*$(*" OR http_uri="*`*`)