CVE-2023-48712
📋 TL;DR
CVE-2023-48712 is an authentication bypass vulnerability in Warpgate that allows non-admin users to impersonate admin accounts when single-factor authentication is configured. An attacker can exploit this by attempting to log in with an incorrect admin password, then entering valid non-admin credentials to gain admin access. All Warpgate installations prior to version 0.9.0 are affected.
💻 Affected Systems
- Warpgate
📦 What is this software?
Warpgate by Warpgate Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where an attacker gains administrative control over the bastion host, potentially accessing all managed SSH, HTTPS, and MySQL connections.
Likely Case
Unauthorized admin access leading to data exfiltration, lateral movement to connected systems, and privilege escalation across the network.
If Mitigated
Limited impact if multi-factor authentication is enforced or if admin accounts are protected by additional controls.
🎯 Exploit Status
Exploitation requires valid non-admin credentials and knowledge of an admin username. The attack sequence is simple and reproducible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.9.0
Vendor Advisory: https://github.com/warp-tech/warpgate/security/advisories/GHSA-c94j-vqr5-3mxr
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Stop Warpgate service. 3. Update to version 0.9.0 or later. 4. Restart Warpgate service. 5. Verify authentication works correctly.
🔧 Temporary Workarounds
Enable Multi-Factor Authentication
linuxConfigure Warpgate to require multi-factor authentication for all users, which prevents this vulnerability.
# Edit Warpgate configuration to enforce MFA
# Refer to Warpgate documentation for MFA setup
🧯 If You Can't Patch
- Implement network segmentation to isolate Warpgate from critical systems
- Enable detailed authentication logging and monitor for suspicious login patterns
🔍 How to Verify
Check if Vulnerable:
Check Warpgate version: if version is below 0.9.0 and single-factor authentication is configured, the system is vulnerable.Check Version:
warpgate --versionVerify Fix Applied:
After upgrading to 0.9.0+, attempt the exploit sequence: try admin login with wrong password, then non-admin with correct credentials. Should fail.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts for admin accounts followed by successful non-admin logins
- User session showing admin privileges from non-admin account
Network Indicators:
- Unusual authentication patterns to Warpgate service
- Admin-level connections originating from non-admin user accounts
SIEM Query:
source="warpgate" (event="login_failed" user="admin*") AND (event="login_success" user!="admin*") WITHIN 5 minutes🔗 References
- https://github.com/warp-tech/warpgate/commit/e3b26b2699257b9482dce2e9157bd9b5e05d9c76
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-c94j-vqr5-3mxr
- https://github.com/warp-tech/warpgate/commit/e3b26b2699257b9482dce2e9157bd9b5e05d9c76
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-c94j-vqr5-3mxr
