CVE-2023-48864
📋 TL;DR
SEMCMS v4.8 contains a SQL injection vulnerability in the languageID parameter of /web_inc.php that allows attackers to execute arbitrary SQL commands. This affects all SEMCMS v4.8 installations using the vulnerable component. Attackers can potentially access, modify, or delete database content.
💻 Affected Systems
- SEMCMS
📦 What is this software?
Semcms by Sem Cms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or remote code execution via database functions.
Likely Case
Unauthorized data access, privilege escalation, or data manipulation in the SEMCMS database.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized, and public proof-of-concept code exists for this CVE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version of SEMCMS if available, or implement workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the languageID parameter before processing
Edit /web_inc.php and add parameter validation: if(!is_numeric($_GET['languageID'])) { die('Invalid input'); }
WAF Rule
allImplement web application firewall rules to block SQL injection patterns
ModSecurity rule: SecRule ARGS:languageID "@detectSQLi" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Restrict network access to SEMCMS administration interface using firewall rules
- Implement database user with minimal necessary permissions (read-only if possible)
🔍 How to Verify
Check if Vulnerable:
Check if SEMCMS version is 4.8 by examining version files or admin panel. Test /web_inc.php with languageID parameter containing SQL injection payloads.Check Version:
Check SEMCMS version in /version.txt or admin panel at /admin/index.phpVerify Fix Applied:
Test the vulnerable endpoint with SQL injection payloads to confirm they are blocked or sanitized. Verify input validation is implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in web server logs
- Multiple requests to /web_inc.php with suspicious languageID parameters
- Database query errors containing SQL syntax
Network Indicators:
- HTTP requests to /web_inc.php with SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/web_inc.php" AND (param="languageID" AND value MATCHES "(?i)(union|select|insert|update|delete|drop|--|#|;)")