CVE-2020-7378
📋 TL;DR
CVE-2020-7378 allows unauthenticated attackers to change any user's password in OpenCRX, including administrative accounts, by connecting to the vulnerable instance. This affects OpenCRX versions 4.30 and 5.0-20200717 and earlier. Attackers can gain full control of the system by resetting admin passwords.
💻 Affected Systems
- OpenCRX
📦 What is this software?
Opencrx by Opencrx
Opencrx by Opencrx
Opencrx by Opencrx
Opencrx by Opencrx
Opencrx by Opencrx
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers reset admin passwords, gain full administrative access, steal sensitive data, deploy ransomware, or use the system as a foothold for lateral movement.
Likely Case
Attackers reset admin or user passwords to gain unauthorized access, potentially leading to data theft, privilege escalation, or business disruption.
If Mitigated
With proper network segmentation and access controls, impact is limited to the OpenCRX instance itself, though credential theft and data exposure remain risks.
🎯 Exploit Status
Exploitation requires only network access to the OpenCRX instance; no authentication or special tools are needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0-20200904
Vendor Advisory: https://www.opencrx.org/
Restart Required: Yes
Instructions:
1. Download OpenCRX version 5.0-20200904 or later from the official website. 2. Backup your current OpenCRX installation and data. 3. Stop the OpenCRX service. 4. Replace the installation with the patched version. 5. Restart the OpenCRX service. 6. Verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to OpenCRX instances using firewalls or network segmentation to limit exposure.
iptables -A INPUT -p tcp --dport [OpenCRX_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [OpenCRX_PORT] -j DROP
Web Application Firewall (WAF)
allDeploy a WAF to block malicious requests targeting the password change functionality.
🧯 If You Can't Patch
- Isolate the OpenCRX instance from untrusted networks using strict firewall rules.
- Implement multi-factor authentication (MFA) for all user accounts to add an extra layer of security.
🔍 How to Verify
Check if Vulnerable:
Check the OpenCRX version via the web interface or by examining installation files; versions 4.30 or 5.0-20200717 and earlier are vulnerable.Check Version:
Check the OpenCRX admin interface or review the release notes in the installation directory.Verify Fix Applied:
Confirm the OpenCRX version is 5.0-20200904 or later and test password change functionality to ensure it requires proper authentication.📡 Detection & Monitoring
Log Indicators:
- Unusual password change requests, especially for admin accounts or from unfamiliar IP addresses.
- Failed login attempts followed by successful password resets.
Network Indicators:
- HTTP POST requests to password change endpoints without prior authentication.
- Traffic from unexpected sources to OpenCRX ports.
SIEM Query:
source="opencrx.log" AND (event="password_change" OR event="user_modify") AND user="admin*"