CVE-2019-7747
📋 TL;DR
CVE-2019-7747 is a session fixation vulnerability in DbNinja 3.2.7 that allows attackers to hijack user sessions by manipulating the sessid parameter in data.php. This affects all DbNinja users running the vulnerable version, potentially compromising database administration sessions.
💻 Affected Systems
- DbNinja
📦 What is this software?
Dbninja by Dbninja
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of database administration sessions leading to unauthorized database access, data theft, manipulation, or destruction.
Likely Case
Session hijacking allowing attackers to perform unauthorized database operations as authenticated users.
If Mitigated
Limited impact with proper session management controls and network segmentation in place.
🎯 Exploit Status
Exploitation requires initial access to set a fixed session ID, then waiting for victim to authenticate.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 3.2.7
Vendor Advisory: https://github.com/OSChina/dbninja
Restart Required: Yes
Instructions:
1. Backup current DbNinja installation. 2. Download latest version from official repository. 3. Replace existing files with patched version. 4. Restart web server/service.
🔧 Temporary Workarounds
Session Regeneration
allImplement session regeneration after authentication to prevent fixation attacks
Modify data.php to regenerate session ID after successful login
Access Restriction
linuxRestrict access to DbNinja interface to trusted networks only
iptables -A INPUT -p tcp --dport [DbNinja_port] -s [trusted_network] -j ACCEPT
iptables -A INPUT -p tcp --dport [DbNinja_port] -j DROP
🧯 If You Can't Patch
- Implement network segmentation to isolate DbNinja from untrusted networks
- Deploy web application firewall with session fixation protection rules
🔍 How to Verify
Check if Vulnerable:
Check if running DbNinja version 3.2.7 by examining version files or web interface footerCheck Version:
grep -r 'version' /path/to/dbninja/installation/ or check web interfaceVerify Fix Applied:
Verify version is updated beyond 3.2.7 and test session handling after authentication📡 Detection & Monitoring
Log Indicators:
- Multiple session IDs for same user
- Session ID changes after authentication
- Unusual database operations from unexpected IPs
Network Indicators:
- HTTP requests to data.php with sessid parameter manipulation
- Session cookie anomalies
SIEM Query:
source="web_logs" url="*data.php*" (sessid OR session) | stats count by src_ip, user_agent