CVE-2023-7331
📋 TL;DR
This CVE describes a SQL injection vulnerability in the User Handler component of PKrystian Full-Stack-Bank. Attackers can remotely exploit this vulnerability to manipulate database queries, potentially accessing or modifying sensitive user data. All deployments using affected versions are vulnerable until patched.
💻 Affected Systems
- PKrystian Full-Stack-Bank
⚠️ 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 allowing data theft, modification, or deletion of all user records and potentially gaining administrative access to the application.
Likely Case
Unauthorized access to user data including personal information, authentication credentials, and financial transaction records.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only allowing data viewing without modification.
🎯 Exploit Status
Remote exploitation is possible, and SQL injection vulnerabilities typically have low exploitation complexity with available tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit 25c9965a872c704f3a9475488dc5d3196902199a
Vendor Advisory: https://github.com/PKrystian/Full-Stack-Bank/commit/25c9965a872c704f3a9475488dc5d3196902199a
Restart Required: Yes
Instructions:
1. Pull the latest code from the repository. 2. Verify you have commit 25c9965a872c704f3a9475488dc5d3196902199a or later. 3. Restart the application service. 4. Test the User Handler functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for all user inputs in the User Handler component
# Add parameterized queries and input sanitization in user_handler.py
Database Permission Reduction
allReduce database user permissions to minimum required for application functionality
REVOKE DELETE, DROP, ALTER FROM application_user;
GRANT SELECT, INSERT, UPDATE ON specific_tables TO application_user;
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with SQL injection rules
- Isolate the application server from the database using network segmentation
🔍 How to Verify
Check if Vulnerable:
Check if your current commit hash is bf73a0179e3ff07c0d7dc35297cea0be0e5b1317 or earlier using 'git log --oneline -1'Check Version:
git log --oneline -1Verify Fix Applied:
Verify current commit includes 25c9965a872c704f3a9475488dc5d3196902199a using 'git log --oneline | grep 25c9965a872c704f3a9475488dc5d3196902199a'📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in application logs
- Multiple failed login attempts with SQL-like syntax in parameters
- Database error messages containing user input
Network Indicators:
- HTTP requests with SQL keywords in parameters (SELECT, UNION, DROP, etc.)
- Unusual database connection patterns from application server
SIEM Query:
source="application.log" AND ("SQL syntax" OR "unclosed quotation" OR "near '" OR "You have an error in your SQL syntax")