CVE-2023-23333
📋 TL;DR
CVE-2023-23333 is a critical command injection vulnerability in SolarView Compact versions up to 6.00 that allows remote attackers to execute arbitrary commands on affected systems. The vulnerability exists in the downloader.php component where attackers can bypass internal restrictions to inject malicious commands. Organizations using SolarView Compact for solar power monitoring systems are affected.
💻 Affected Systems
- SolarView Compact
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands with root privileges, install malware, pivot to internal networks, and disrupt critical infrastructure operations.
Likely Case
Remote code execution leading to data theft, system manipulation, installation of backdoors, and potential ransomware deployment.
If Mitigated
Limited impact with proper network segmentation, but still potential for service disruption if exploited.
🎯 Exploit Status
Multiple public proof-of-concept exploits available with simple HTTP requests to downloader.php endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 6.00
Vendor Advisory: https://www.contec.com/jp/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_solarview_230316_en.pdf
Restart Required: Yes
Instructions:
1. Check current SolarView Compact version. 2. Contact Contec for patched version. 3. Backup configuration. 4. Apply update. 5. Restart system. 6. Verify patch installation.
🔧 Temporary Workarounds
Block downloader.php access
linuxRestrict access to vulnerable downloader.php endpoint using web server configuration or firewall rules.
# Apache: RewriteRule ^/downloader\.php$ - [F]
# Nginx: location ~ /downloader\.php$ { deny all; }
Network segmentation
linuxIsolate SolarView Compact systems from internet and restrict internal network access.
# Firewall rule example: iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SolarView Compact from internet and other critical systems
- Deploy web application firewall (WAF) with command injection detection rules and restrict access to downloader.php endpoint
🔍 How to Verify
Check if Vulnerable:
Check if SolarView Compact version is 6.00 or earlier by accessing the web interface or checking system information.Check Version:
curl -s http://solarview-ip/ | grep -i 'solarview' or check web interface login pageVerify Fix Applied:
Verify version is updated beyond 6.00 and test if downloader.php endpoint no longer accepts malicious command injection payloads.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to downloader.php with suspicious parameters
- Command execution patterns in system logs
- Unusual process creation from web server user
Network Indicators:
- HTTP POST/GET requests to /downloader.php with command injection patterns
- Outbound connections from SolarView system to unknown IPs
SIEM Query:
source="web_logs" AND uri_path="/downloader.php" AND (param="*;*" OR param="*|*" OR param="*`*" OR param="*$(*" OR param="*%26%26*" OR param="*||*")