CVE-2023-49641
📋 TL;DR
Billing Software v1.0 contains unauthenticated SQL injection vulnerabilities in the loginCheck.php file, allowing attackers to execute arbitrary SQL commands without credentials. This affects all users running the vulnerable software version, potentially compromising the entire database and application.
💻 Affected Systems
- Billing Software
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, authentication bypass, and potential remote code execution on the underlying server.
Likely Case
Database information disclosure, credential theft, and potential privilege escalation within the application.
If Mitigated
Limited impact with proper input validation and database permissions, though SQL injection attempts would still be logged.
🎯 Exploit Status
SQL injection in login functionality is commonly exploited with automated tools. Public advisories provide technical details that facilitate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider implementing input validation and parameterized queries in loginCheck.php, or replace with secure authentication system.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious requests.
Input Validation Filter
allAdd input validation to sanitize username parameter before database query.
// In loginCheck.php, add: $username = mysqli_real_escape_string($connection, $_POST['username']);
🧯 If You Can't Patch
- Isolate the system from internet access and restrict internal network access
- Implement strict database permissions and monitor for unusual SQL queries
🔍 How to Verify
Check if Vulnerable:
Test login functionality with SQL injection payloads like ' OR '1'='1 in username field and observe database errors or unexpected behavior.Check Version:
Check software documentation or configuration files for version information, typically in about.php or readme files.Verify Fix Applied:
Attempt SQL injection payloads and verify they are rejected or properly escaped without affecting database queries.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax errors in application logs
- Multiple failed login attempts with SQL-like patterns
- Database query errors containing user input
Network Indicators:
- HTTP POST requests to loginCheck.php with SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/loginCheck.php" AND (request_body CONTAINS "' OR" OR request_body CONTAINS "UNION" OR request_body CONTAINS "SELECT *")