CVE-2023-37917
📋 TL;DR
This vulnerability in KubePi allows any authenticated user to elevate privileges to administrator by modifying the 'isadmin' parameter when creating or updating users. All KubePi deployments running vulnerable versions are affected, enabling complete administrative takeover of the Kubernetes management panel.
💻 Affected Systems
- KubePi
📦 What is this software?
Kubepi by Fit2cloud
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the KubePi instance, allowing attackers to manage all Kubernetes resources, deploy malicious containers, exfiltrate sensitive data, and potentially pivot to the underlying Kubernetes cluster.
Likely Case
Unauthorized users gain administrative access to KubePi, enabling them to create/delete users, modify configurations, and access all Kubernetes resources managed through the panel.
If Mitigated
With proper network segmentation and access controls, impact is limited to the KubePi application itself, though administrative control still poses significant risk.
🎯 Exploit Status
Exploitation requires authenticated access but is trivial - simply modifying a parameter in user creation/update requests. No special tools or knowledge required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.5
Vendor Advisory: https://github.com/1Panel-dev/KubePi/security/advisories/GHSA-757p-vx43-fp9r
Restart Required: Yes
Instructions:
1. Backup current KubePi configuration and data. 2. Stop KubePi service. 3. Update to version 1.6.5 using your deployment method (Docker, Kubernetes, or binary). 4. Restart KubePi service. 5. Verify functionality and that the fix is applied.
🔧 Temporary Workarounds
No official workarounds
allThe vendor advisory states there are no known workarounds for this vulnerability
🧯 If You Can't Patch
- Isolate KubePi instance from production Kubernetes clusters and restrict network access
- Disable user management functionality if possible and use only admin accounts
🔍 How to Verify
Check if Vulnerable:
Check KubePi version via web interface or API. If version is below 1.6.5, the system is vulnerable.Check Version:
Check KubePi web interface dashboard or use API endpoint /api/v1/system/versionVerify Fix Applied:
After upgrading to 1.6.5, attempt to create a user with 'isadmin' parameter set to true using a non-admin account. This should fail with permission error.📡 Detection & Monitoring
Log Indicators:
- User creation/update requests with 'isadmin' parameter from non-admin users
- Sudden privilege escalation events
- Multiple admin user creation attempts
Network Indicators:
- POST/PUT requests to user management endpoints with modified parameters
- Unusual API calls from previously low-privilege accounts
SIEM Query:
source="kubepi" AND (uri_path="/api/v1/users" OR uri_path="/api/v1/user") AND (http_method="POST" OR http_method="PUT") AND request_body CONTAINS "isadmin"