CVE-2022-33114
📋 TL;DR
CVE-2022-33114 is a SQL injection vulnerability in Jfinal CMS v5.1.0 that allows attackers to execute arbitrary SQL commands via the attrVal parameter in the /jfinal_cms/system/dict/list endpoint. This affects all organizations running vulnerable versions of Jfinal CMS, potentially exposing database contents and system integrity.
💻 Affected Systems
- Jfinal CMS
📦 What is this software?
Jfinal Cms by Jflyfox
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data manipulation, privilege escalation, and potential remote code execution through database functions.
Likely Case
Unauthorized data extraction from the CMS database, including user credentials, sensitive content, and configuration data.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Exploitation requires authentication to access the /system/dict/list endpoint, but SQL injection payloads are straightforward to craft.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.1.1 or later
Vendor Advisory: https://github.com/jflyfox/jfinal_cms/issues/38
Restart Required: Yes
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. Restart the application server. 5. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize the attrVal parameter before processing.
Implement parameter validation in the controller handling /system/dict/list to allow only expected characters
WAF Rule
allDeploy web application firewall rules to block SQL injection patterns targeting the vulnerable endpoint.
Configure WAF to detect and block SQL injection patterns in requests to /jfinal_cms/system/dict/list
🧯 If You Can't Patch
- Implement strict network access controls to limit access to the vulnerable endpoint to authorized users only.
- Deploy database monitoring to detect unusual SQL queries and implement database-level protections like prepared statements.
🔍 How to Verify
Check if Vulnerable:
Test the /jfinal_cms/system/dict/list endpoint with SQL injection payloads in the attrVal parameter and observe if database errors or unexpected results occur.Check Version:
Check the application version in the admin panel or review the project configuration files for version information.Verify Fix Applied:
After patching, attempt the same SQL injection tests and verify they are properly rejected or sanitized without database errors.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by access to /system/dict/list
- HTTP requests containing SQL keywords like UNION, SELECT, or DROP in the attrVal parameter
Network Indicators:
- Unusual outbound database connections from the application server
- HTTP traffic patterns showing repeated access to the vulnerable endpoint with varying parameters
SIEM Query:
source="web_server" AND uri="/jfinal_cms/system/dict/list" AND (param="attrVal" AND value CONTAINS "UNION" OR value CONTAINS "SELECT" OR value CONTAINS "--")