CVE-2018-17796
📋 TL;DR
This SQL injection vulnerability in MRCMS (mushroom) allows attackers to execute arbitrary SQL commands through the FIELD_T parameter. It affects all users running MRCMS versions up to 3.1.2, potentially leading to data theft, modification, or complete system compromise.
💻 Affected Systems
- MRCMS (mushroom)
📦 What is this software?
Mushroom Content Management System by Mushroom Content Management System Project
View all CVEs affecting Mushroom Content Management System →
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data exfiltration, data destruction, privilege escalation to admin, and potential remote code execution via database functions.
Likely Case
Unauthorized data access and modification, extraction of sensitive user information, and potential administrative account takeover.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
SQL injection via FIELD_T parameter is straightforward to exploit. Public GitHub issues demonstrate the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 3.1.2
Vendor Advisory: https://github.com/wuweiit/mushroom/issues/16
Restart Required: Yes
Instructions:
1. Upgrade to latest MRCMS version. 2. Replace vulnerable WebParam.java and ChannelService.java files. 3. Restart the application server.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize FIELD_T parameter before processing
Implement parameterized queries or input validation in WebParam.java
WAF Rule
allDeploy web application firewall to block SQL injection patterns
Add WAF rule to detect and block SQL injection in FIELD_T parameter
🧯 If You Can't Patch
- Implement network segmentation to isolate MRCMS from critical databases
- Deploy database monitoring to detect unusual SQL queries and block suspicious activity
🔍 How to Verify
Check if Vulnerable:
Test if FIELD_T parameter accepts SQL injection payloads in getChannel() endpointCheck Version:
Check MRCMS version in admin panel or configuration filesVerify Fix Applied:
Verify parameterized queries are used and FIELD_T input is properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts via SQL injection patterns
- Database error messages containing SQL syntax
Network Indicators:
- HTTP requests with SQL keywords in FIELD_T parameter
- Unusual database connection patterns from application server
SIEM Query:
source="web_logs" AND (FIELD_T CONTAINS "UNION" OR FIELD_T CONTAINS "SELECT" OR FIELD_T CONTAINS "INSERT")