CVE-2023-27742
📋 TL;DR
IDURAR ERP/CRM v1 contains a SQL injection vulnerability in the login API endpoint that allows attackers to execute arbitrary SQL commands. This affects all organizations using IDURAR ERP/CRM v1. Attackers can potentially bypass authentication, access sensitive data, or compromise the entire database.
💻 Affected Systems
- IDURAR ERP/CRM
📦 What is this software?
Idurar by Idurarapp
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, authentication bypass, privilege escalation, and potential remote code execution on the underlying server.
Likely Case
Authentication bypass allowing unauthorized access to the ERP/CRM system, data exfiltration of sensitive business information, and potential lateral movement within the network.
If Mitigated
Limited impact with proper input validation, parameterized queries, and web application firewall rules blocking SQL injection patterns.
🎯 Exploit Status
The login endpoint is typically accessible without authentication, making exploitation straightforward. Public proof-of-concept code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check for official patches from IDURAR
2. If no patch available, implement workarounds
3. Consider upgrading to a newer version if available
🔧 Temporary Workarounds
Web Application Firewall Rules
allImplement WAF rules to block SQL injection patterns targeting the /api/login endpoint
# Example ModSecurity rule:
SecRule REQUEST_URI "@streq /api/login" \
"chain,id:1001,phase:2,deny,status:403,msg:'SQLi attempt on login API'"
SecRule ARGS "@detectSQLi"
Input Validation Filter
allAdd input validation middleware to sanitize login parameters
# Example PHP filter for login parameters:
function sanitizeLoginInput($input) {
$input = trim($input);
$input = stripslashes($input);
$input = htmlspecialchars($input, ENT_QUOTES, 'UTF-8');
return $input;
}
🧯 If You Can't Patch
- Isolate the IDURAR system in a separate network segment with strict access controls
- Implement rate limiting and monitoring on the /api/login endpoint to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Test the /api/login endpoint with SQL injection payloads like ' OR '1'='1 in username or password fields and observe if authentication bypass occursCheck Version:
Check the application version in the admin panel or via application metadata filesVerify Fix Applied:
Attempt the same SQL injection tests and verify they are rejected or properly sanitized without allowing authentication bypass📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in login attempts
- Multiple failed login attempts with SQL keywords
- Successful logins from unexpected IP addresses
Network Indicators:
- HTTP POST requests to /api/login containing SQL keywords (UNION, SELECT, INSERT, etc.)
- Abnormal response patterns from login endpoint
SIEM Query:
source="web_logs" AND uri="/api/login" AND (request_body LIKE "%UNION%" OR request_body LIKE "%SELECT%" OR request_body LIKE "%INSERT%")