CVE-2021-46377
📋 TL;DR
CVE-2021-46377 is a SQL injection vulnerability in CSZCMS 1.2.9 that allows attackers to execute arbitrary SQL commands through the Member.php controller. This affects all users running vulnerable versions of CSZCMS, potentially leading to data theft, modification, or complete system compromise.
💻 Affected Systems
- CSZCMS
📦 What is this software?
Cszcms by Cskaza
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data exfiltration, data manipulation, privilege escalation to admin, and potential remote code execution via database functions.
Likely Case
Unauthorized data access and extraction of sensitive user information, configuration data, and potentially authentication credentials.
If Mitigated
Limited impact with proper input validation and parameterized queries in place, potentially only allowing limited data enumeration.
🎯 Exploit Status
The GitHub issue shows exploitation details and SQL injection payloads. SQL injection vulnerabilities are commonly weaponized in automated attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.0 or later
Vendor Advisory: https://github.com/cskaza/cszcms/issues/33
Restart Required: No
Instructions:
1. Backup your current installation and database. 2. Download the latest version from the official repository. 3. Replace vulnerable files with patched versions. 4. Verify the Member.php controller uses parameterized queries.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize user inputs before processing in Member.php
# Add input validation in cszcms/controllers/Member.php around vulnerable parameters
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns
# Example ModSecurity rule: SecRule ARGS "@detectSQLi" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in the vulnerable Member.php controller
- Deploy a web application firewall with SQL injection detection rules and restrict access to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check if your CSZCMS version is 1.2.9 or earlier and examine cszcms/controllers/Member.php for lack of parameterized queries in the viewUser function.Check Version:
Check the version.php file or admin panel for version informationVerify Fix Applied:
Verify that Member.php uses prepared statements or parameterized queries and test with SQL injection payloads that should be rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts with SQL syntax
- Requests to Member.php with SQL keywords in parameters
Network Indicators:
- HTTP requests containing SQL injection patterns to /cszcms/controllers/Member.php
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (uri="/cszcms/controllers/Member.php" AND (param="*SELECT*" OR param="*UNION*" OR param="*OR 1=1*"))