CVE-2025-70831
📋 TL;DR
An unauthenticated remote code execution vulnerability exists in Smanga 3.2.7 where the /php/path/rescan.php interface fails to sanitize the mediaId parameter before passing it to a system shell command. This allows attackers to execute arbitrary operating system commands on the server, potentially leading to complete system compromise. All systems running Smanga 3.2.7 with the vulnerable interface exposed are affected.
💻 Affected Systems
- Smanga
📦 What is this software?
Smanga by Lkw199711
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover with attacker gaining root/system-level access, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Server compromise leading to data theft, cryptocurrency mining, or use as a botnet node, given the unauthenticated nature and command injection vector.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and input validation are in place, though exploitation attempts may still occur.
🎯 Exploit Status
The vulnerability requires no authentication and involves simple command injection, making exploitation trivial for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch is available. Monitor the Smanga project for updates and apply any security patches immediately when released.
🔧 Temporary Workarounds
Block Vulnerable Endpoint
allRestrict access to the /php/path/rescan.php endpoint using web server configuration or firewall rules.
# Apache: Add to .htaccess or virtual host config
<Location "/php/path/rescan.php">
Deny from all
</Location>
# Nginx: Add to server block
location /php/path/rescan.php {
deny all;
}
Input Validation Patch
linuxManually patch the vulnerable file to sanitize the mediaId parameter before use in shell commands.
# Backup original file
cp /path/to/smanga/php/path/rescan.php /path/to/smanga/php/path/rescan.php.backup
# Edit file to add input validation (example using escapeshellarg)
# Replace the vulnerable line with: $mediaId = escapeshellarg($_POST['mediaId']);
🧯 If You Can't Patch
- Immediately restrict network access to the Smanga instance using firewall rules to allow only trusted IPs.
- Deploy a web application firewall (WAF) with command injection rules to block exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check if the /php/path/rescan.php endpoint is accessible and accepts POST requests with a mediaId parameter. Test with a harmless command injection payload like '; whoami;' to see if it executes.Check Version:
Check the Smanga version in the application interface or configuration files. For Linux, try: grep -r "version" /path/to/smanga/ | grep -i smangaVerify Fix Applied:
After applying workarounds, attempt to access the /php/path/rescan.php endpoint and test command injection; it should be blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /php/path/rescan.php with shell metacharacters (;, |, &, $, etc.) in parameters
- Unexpected system commands in web server logs (e.g., whoami, id, wget, curl)
Network Indicators:
- Spikes in traffic to the vulnerable endpoint from untrusted sources
- Outbound connections from the server to unknown IPs post-exploitation
SIEM Query:
source="web_server_logs" AND uri="/php/path/rescan.php" AND (param="mediaId" AND value="*;*" OR value="*|*" OR value="*&*" OR value="*`*" OR value="*$(*")