CVE-2021-47744
📋 TL;DR
CVE-2021-47744 is a hard-coded credentials vulnerability in Cypress Solutions CTM-200/CTM-ONE devices running version 1.3.6. Attackers can use the static 'Chameleon' password to gain remote root access via Telnet or SSH, allowing complete compromise of affected devices. Organizations using these specific industrial control system devices are affected.
💻 Affected Systems
- Cypress Solutions CTM-200
- Cypress Solutions CTM-ONE
⚠️ 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
Complete device takeover with root access, allowing attackers to modify configurations, install malware, pivot to other network segments, or disrupt industrial operations.
Likely Case
Unauthorized root access leading to data theft, device manipulation, and potential lateral movement within the network.
If Mitigated
Limited impact if devices are isolated in segmented networks with strict access controls and monitoring.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB (ID 50407). Attack requires only knowledge of the hard-coded password.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.cypress.bc.ca
Restart Required: No
Instructions:
Contact Cypress Solutions for updated firmware. No official patch information is publicly documented.
🔧 Temporary Workarounds
Disable Telnet and SSH Services
linuxDisable remote access services to prevent exploitation.
systemctl stop telnet
systemctl stop ssh
systemctl disable telnet
systemctl disable ssh
Change Root Password
linuxChange the root password from the default 'Chameleon' credential.
passwd root
🧯 If You Can't Patch
- Network segmentation: Isolate CTM devices in separate VLANs with strict firewall rules.
- Access control: Implement IP whitelisting for management interfaces and disable unnecessary services.
🔍 How to Verify
Check if Vulnerable:
Attempt to SSH/Telnet to the device using username 'root' and password 'Chameleon'.Check Version:
Check device firmware version via web interface or CLI: cat /etc/versionVerify Fix Applied:
Verify that the root password has been changed and SSH/Telnet access is restricted or disabled.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful root login
- Multiple SSH/Telnet connection attempts from unusual sources
Network Indicators:
- Telnet/SSH traffic to CTM devices from unauthorized IPs
- Unusual outbound connections from CTM devices
SIEM Query:
source="*ctm*" AND (event="authentication success" AND user="root") OR (protocol="ssh" OR protocol="telnet")