CVE-2025-67840
📋 TL;DR
Multiple authenticated OS command injection vulnerabilities in Cohesity TranZman 4.0 allow authenticated admin users to execute arbitrary commands with root privileges. Attackers can intercept legitimate API requests and modify parameters to bypass the restricted shell confinement, leading to complete system compromise. This affects all systems running vulnerable versions of the TranZman web application.
💻 Affected Systems
- Cohesity TranZman
📦 What is this software?
Tranzman by Cohesity
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root access, allowing data theft, lateral movement, persistence establishment, and complete appliance control.
Likely Case
Authenticated attackers with admin privileges gain remote code execution, enabling data exfiltration, credential harvesting, and backdoor installation.
If Mitigated
With proper network segmentation and admin credential protection, impact is limited to the appliance itself without lateral movement.
🎯 Exploit Status
Exploitation requires admin credentials and proxy interception of legitimate API requests. Public proof-of-concept code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://cohesity.com
Restart Required: No
Instructions:
Check Cohesity security advisories for patch availability. If patch exists, download from vendor portal and apply following vendor instructions.
🔧 Temporary Workarounds
Network Segmentation
allIsolate TranZman appliance from sensitive networks and restrict admin access to trusted IPs only.
Admin Credential Protection
allImplement strong password policies, multi-factor authentication, and regular credential rotation for admin accounts.
🧯 If You Can't Patch
- Monitor admin account activity and API access logs for suspicious patterns
- Implement web application firewall rules to block command injection patterns in API requests
🔍 How to Verify
Check if Vulnerable:
Check TranZman version via web interface or CLI. If version is 4.0 Build 14614 or earlier, system is vulnerable.Check Version:
Check web interface admin panel or consult appliance documentation for version commandVerify Fix Applied:
Verify patch installation via version check and test API endpoints with safe command injection payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual API requests with shell metacharacters
- Multiple failed authentication attempts followed by successful admin login
- Suspicious command execution in system logs
Network Indicators:
- Unusual outbound connections from appliance
- API requests containing shell metacharacters like ;, |, &, $()
SIEM Query:
source="tranzman" AND (command="*;*" OR command="*|*" OR command="*&*" OR command="*$(*")