CVE-2023-26780
📋 TL;DR
CVE-2023-26780 is a SQL injection vulnerability in CleverStupidDog yf-exam version 1.8.0 that allows attackers to execute arbitrary SQL commands. This affects all users running the vulnerable version of this software. Successful exploitation could lead to data theft, data manipulation, or complete system compromise.
💻 Affected Systems
- CleverStupidDog yf-exam
📦 What is this software?
Yf Exam by Yf Exam Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data exfiltration, data destruction, privilege escalation to database administrator, and potential remote code execution on the underlying server.
Likely Case
Unauthorized access to sensitive data stored in the database, including user credentials, personal information, and application data.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permissions restricting user privileges.
🎯 Exploit Status
SQL injection vulnerabilities are well-understood and frequently exploited. Public GitHub references demonstrate the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Check for updated versions from the vendor. 2. If no patch available, implement workarounds. 3. Consider replacing with alternative software.
🔧 Temporary Workarounds
Implement Input Validation
allAdd server-side input validation to sanitize all user inputs before processing SQL queries.
Use Parameterized Queries
allReplace dynamic SQL queries with parameterized queries or prepared statements.
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with SQL injection rules
- Restrict database user permissions to minimum required access
- Isolate the vulnerable system from sensitive networks
🔍 How to Verify
Check if Vulnerable:
Check if running yf-exam version 1.8.0. Review application code for unsanitized user input in SQL queries.Check Version:
Check application configuration files or package manager for version informationVerify Fix Applied:
Test SQL injection payloads against the application to confirm they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Multiple failed login attempts with SQL syntax
- Database error messages containing user input
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, DROP, etc.)
- Unusual database connection patterns
SIEM Query:
source="web_logs" AND ("SELECT" OR "UNION" OR "DROP" OR "INSERT" OR "UPDATE") AND status="200"