CVE-2024-28421
📋 TL;DR
CVE-2024-28421 is a critical SQL injection vulnerability in Razor 0.8.0 that allows remote attackers to execute arbitrary SQL commands via the ChannelModel::updateapk method. This can lead to privilege escalation, data theft, or complete system compromise. Organizations using Razor 0.8.0 for analytics or mobile app tracking are affected.
💻 Affected Systems
- Razor
📦 What is this software?
Razor by Cobub
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover: attacker gains administrative access, exfiltrates all database data, installs backdoors, or executes arbitrary code on the underlying server.
Likely Case
Privilege escalation leading to unauthorized administrative access, data exfiltration of sensitive analytics information, and potential lateral movement within the network.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation preventing database access beyond intended scope.
🎯 Exploit Status
Proof-of-concept code is publicly available in GitHub gists and issue trackers. Exploitation requires access to the vulnerable endpoint but doesn't require authentication to the Razor application itself if the endpoint is exposed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.8.1 or later
Vendor Advisory: https://github.com/cobub/razor/issues/178
Restart Required: Yes
Instructions:
1. Backup your current Razor installation and database. 2. Download the latest version from the official repository. 3. Replace the vulnerable channelmodle.php file with the patched version. 4. Restart the web server service. 5. Verify the fix by testing the updateapk functionality.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and parameterized queries for the updateapk method parameters
Modify channelmodle.php to use prepared statements: $stmt = $db->prepare('UPDATE table SET column = ? WHERE id = ?'); $stmt->bind_param('si', $value, $id); $stmt->execute();
Access Restriction
linuxRestrict network access to the Razor application using firewall rules
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Immediately restrict network access to the Razor application using firewall rules to only allow trusted IP addresses.
- Implement a web application firewall (WAF) with SQL injection protection rules in front of the Razor application.
🔍 How to Verify
Check if Vulnerable:
Check if your Razor installation is version 0.8.0 by examining the version file or checking the installed files timestamp. Review channelmodle.php for lack of parameterized queries in the updateapk method.Check Version:
grep -r 'version' /path/to/razor/installation/ | grep -i '0.8.0'Verify Fix Applied:
After patching, test the updateapk functionality with SQL injection payloads (e.g., ' OR '1'='1) and verify they are properly sanitized or rejected. Check that database queries execute without error.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in database logs
- Multiple failed login attempts followed by successful administrative access
- Unexpected database schema modifications
Network Indicators:
- Unusual outbound database connections from the Razor server
- SQL injection payloads in HTTP requests to channelmodle.php endpoints
SIEM Query:
source="web_logs" AND (url="*channelmodle.php*" AND (payload="*' OR*" OR payload="*UNION SELECT*" OR payload="*;--*"))