CVE-2024-23827
📋 TL;DR
CVE-2024-23827 is a critical path traversal vulnerability in Nginx-UI's Import Certificate feature that allows attackers to write arbitrary files to the system. This can lead to remote code execution by overwriting configuration files like app.ini. All users running Nginx-UI versions before 2.0.0.beta.12 are affected.
💻 Affected Systems
- Nginx-UI
📦 What is this software?
Nginx Ui by Nginxui
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Nginx Ui by Nginxui
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Nginx Ui by Nginxui
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Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
Nginx Ui by Nginxui
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through remote code execution, allowing attackers to execute arbitrary commands, steal data, or deploy ransomware.
Likely Case
Unauthorized file writes leading to configuration manipulation, service disruption, or privilege escalation.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation requires authentication to access the Import Certificate feature, but the vulnerability itself is simple to exploit once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.0.beta.12 and later
Vendor Advisory: https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-xvq9-4vpv-227m
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Stop Nginx-UI service. 3. Update to version 2.0.0.beta.12 or later. 4. Restart Nginx-UI service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable Import Certificate Feature
allRemove or restrict access to the vulnerable Import Certificate functionality
# Modify Nginx-UI configuration to disable certificate import
# Or use firewall rules to block access to the feature endpoint
Network Access Restriction
linuxRestrict network access to Nginx-UI administration interface
# Example iptables rule: iptables -A INPUT -p tcp --dport [NGINX-UI-PORT] -s [TRUSTED-IP] -j ACCEPT
# iptables -A INPUT -p tcp --dport [NGINX-UI-PORT] -j DROP
🧯 If You Can't Patch
- Disable Nginx-UI entirely and use alternative configuration management methods
- Implement strict network segmentation and only allow trusted IPs to access the Nginx-UI interface
🔍 How to Verify
Check if Vulnerable:
Check Nginx-UI version. If version is earlier than 2.0.0.beta.12, the system is vulnerable.Check Version:
Check the Nginx-UI web interface dashboard or configuration files for version informationVerify Fix Applied:
Verify Nginx-UI version is 2.0.0.beta.12 or later and test that Import Certificate feature properly validates file paths.📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations in system logs
- Multiple failed or successful certificate import attempts
- Unauthorized configuration file modifications
Network Indicators:
- HTTP POST requests to certificate import endpoints with suspicious file paths
- Unusual traffic patterns to Nginx-UI administration interface
SIEM Query:
source="nginx-ui" AND (event="certificate_import" OR path="*../*")