CVE-2021-47848
📋 TL;DR
Blitar Tourism 1.0 contains an SQL injection vulnerability in the login mechanism that allows attackers to bypass authentication and gain administrative access. This affects all deployments of Blitar Tourism 1.0 web applications. Attackers can exploit this without valid credentials by manipulating the username parameter.
💻 Affected Systems
- Blitar Tourism
⚠️ 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 system compromise where attackers gain administrative access, potentially leading to data theft, defacement, or installation of backdoors.
Likely Case
Unauthorized administrative access allowing attackers to modify content, access sensitive data, or escalate privileges within the application.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing successful exploitation.
🎯 Exploit Status
Public exploit code available on Exploit-DB. Attack requires no authentication and uses basic SQL injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider implementing parameterized queries and input validation in the login.php file.
🔧 Temporary Workarounds
Implement Input Validation
allAdd server-side validation to sanitize username input and reject SQL special characters
Modify login.php to include input sanitization functions
Web Application Firewall
allDeploy WAF with SQL injection protection rules
Configure WAF to block SQL injection patterns in login requests
🧯 If You Can't Patch
- Isolate the application behind a reverse proxy with SQL injection filtering
- Implement network segmentation to limit access to the vulnerable system
🔍 How to Verify
Check if Vulnerable:
Test login endpoint with SQL injection payloads in username parameter (e.g., admin' OR '1'='1)Check Version:
Check application version in source code or configuration filesVerify Fix Applied:
Attempt SQL injection after implementing fixes; successful login should only occur with valid credentials📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts with SQL special characters in username field
- Successful login from unusual IP addresses
Network Indicators:
- HTTP POST requests to login.php containing SQL keywords in parameters
SIEM Query:
source="web_logs" AND uri="/login.php" AND (username CONTAINS "' OR" OR username CONTAINS "--" OR username CONTAINS ";")