CVE-2023-41566
📋 TL;DR
CVE-2023-41566 is an arbitrary file download vulnerability in OA EKP v16 that allows attackers to download sensitive files including administrator passwords via the /ui/sys_ui_extend/sysUiExtend.do endpoint. This affects organizations using Landray OA EKP v16 software. Successful exploitation can lead to complete system compromise.
💻 Affected Systems
- Landray OA EKP
⚠️ 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
Attackers obtain administrator credentials, gain database access, exfiltrate sensitive data, and achieve persistent control over the entire system.
Likely Case
Attackers download configuration files containing credentials, gain administrative access to the OA system, and potentially access connected databases.
If Mitigated
With proper network segmentation and access controls, impact is limited to the OA application server only.
🎯 Exploit Status
Public proof-of-concept demonstrates exploitation via simple HTTP requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Contact Landray for security updates or upgrade to a newer version if available.
🔧 Temporary Workarounds
Block Vulnerable Endpoint
allBlock access to the /ui/sys_ui_extend/sysUiExtend.do endpoint using web application firewall or reverse proxy rules.
# Example nginx location block:
location /ui/sys_ui_extend/sysUiExtend.do { deny all; }
# Example Apache .htaccess:
<Files "sysUiExtend.do">
Order Allow,Deny
Deny from all
</Files>
Network Access Control
linuxRestrict access to the OA EKP application to trusted IP addresses only.
# Example iptables rule:
iptables -A INPUT -p tcp --dport [OA_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [OA_PORT] -j DROP
🧯 If You Can't Patch
- Isolate the OA EKP server in a separate network segment with strict firewall rules
- Implement multi-factor authentication for all administrative accounts
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://[target]/ui/sys_ui_extend/sysUiExtend.do?method=download&fileName=../../WEB-INF/classes/jdbc.properties and check if it returns database configuration.Check Version:
Check the OA EKP version in the web interface or configuration files. The exact command depends on installation method.Verify Fix Applied:
Verify the vulnerable endpoint returns 403 Forbidden or is inaccessible after applying workarounds.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /ui/sys_ui_extend/sysUiExtend.do with download parameter
- Access to sensitive files like jdbc.properties from web requests
- Unusual file download patterns from the OA application
Network Indicators:
- HTTP GET requests with path traversal sequences (../../) to the vulnerable endpoint
- Downloads of configuration files from the OA server
SIEM Query:
source="oa_web_logs" AND uri="/ui/sys_ui_extend/sysUiExtend.do" AND (query="*download*" OR query="*fileName=*" OR query="*../*")