CVE-2024-27515
📋 TL;DR
CVE-2024-27515 is a SQL injection vulnerability in Osclass 5.1.2 that allows attackers to execute arbitrary SQL commands through crafted inputs. This affects all Osclass installations running version 5.1.2, potentially compromising database integrity and confidentiality.
💻 Affected Systems
- Osclass
📦 What is this software?
Osclass by Mindstellar
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data manipulation, privilege escalation, and potential remote code execution if database functions allow it.
Likely Case
Unauthorized data access, data exfiltration, and potential authentication bypass through database manipulation.
If Mitigated
Limited impact with proper input validation and parameterized queries in place, potentially only error-based information disclosure.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized, and the public GitHub issue provides technical details that could be used to create exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.1.3 or later
Vendor Advisory: https://github.com/mindstellar/Osclass/issues/495
Restart Required: No
Instructions:
1. Backup your Osclass installation and database. 2. Download the latest Osclass version from the official repository. 3. Replace all files with the updated version. 4. Verify the installation works correctly.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for all user-supplied parameters before database queries
Modify PHP files to add parameterized queries using prepared statements
Web Application Firewall
allDeploy a WAF with SQL injection protection rules
Configure WAF to block SQL injection patterns
🧯 If You Can't Patch
- Implement network segmentation to isolate Osclass server from critical systems
- Enable detailed SQL query logging and monitor for suspicious patterns
🔍 How to Verify
Check if Vulnerable:
Check if Osclass version is 5.1.2 by examining the version file or admin panelCheck Version:
Check oc_version.php file or admin panel at /oc-admin/index.php?page=tools&action=versionVerify Fix Applied:
Verify Osclass version is 5.1.3 or later and test input fields for SQL injection📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in web server logs
- Multiple failed login attempts with SQL syntax
- Long or unusual parameter values in access logs
Network Indicators:
- HTTP requests containing SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_access.log" AND ("UNION" OR "SELECT" OR "INSERT" OR "UPDATE" OR "DELETE" OR "DROP" OR "--" OR "' OR '1'='1")