CVE-2024-8707
π TL;DR
This vulnerability allows remote attackers to perform path traversal attacks in Yunke Online School System versions up to 3.0.6. By manipulating the 'url' parameter in the downfile function, attackers can access files outside the intended directory. Organizations using this educational software are affected.
π» Affected Systems
- δΊθ―Ύη½η»η§ζζιε ¬εΈ Yunke Online School System
β οΈ 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).
π 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
β οΈ Risk & Real-World Impact
Worst Case
Attackers could read sensitive system files, configuration files, or user data stored on the server, potentially leading to data breach or system compromise.
Likely Case
Unauthorized file access leading to information disclosure of application files, configuration data, or user information.
If Mitigated
Limited to accessing only non-sensitive files within the application directory if proper file permissions are configured.
π― Exploit Status
Exploit requires admin access to the vulnerable function. Public disclosure increases likelihood of weaponization.
π οΈ Fix & Mitigation
β Official Fix
Patch Version: Unknown
Vendor Advisory: None provided
Restart Required: No
Instructions:
No official patch available. Monitor vendor for updates to version 3.0.7 or later.
π§ Temporary Workarounds
Input Validation and Sanitization
allAdd input validation to the downfile function to prevent path traversal sequences
Modify application/admin/controller/Appadmin.php to validate and sanitize the 'url' parameter
Access Restriction
allRestrict access to the vulnerable admin controller function
Add authentication checks and IP restrictions to Appadmin.php
π§― If You Can't Patch
- Implement web application firewall (WAF) rules to block path traversal patterns
- Restrict network access to the admin interface using firewall rules
π How to Verify
Check if Vulnerable:
Check if your Yunke Online School System version is 3.0.6 or earlier. Review the Appadmin.php file for proper input validation in the downfile function.Check Version:
Check system version in admin panel or configuration filesVerify Fix Applied:
Test the downfile function with path traversal payloads to ensure they are blocked. Verify file access is restricted to intended directories.π‘ Detection & Monitoring
Log Indicators:
- Multiple failed attempts to access files with '../' sequences in URL parameters
- Unusual file access patterns from admin accounts
Network Indicators:
- HTTP requests containing '../' sequences in parameters to admin endpoints
SIEM Query:
source="web_logs" AND (url="*../*" OR parameters="*../*") AND endpoint="*Appadmin*"