CVE-2020-3336
📋 TL;DR
This vulnerability allows authenticated remote attackers with administrative privileges to execute arbitrary commands on Cisco TelePresence and RoomOS devices. Attackers can gain root access or cause denial of service by sending malformed parameters via console, SSH, or web API. Organizations using affected Cisco collaboration endpoints are at risk.
💻 Affected Systems
- Cisco TelePresence Collaboration Endpoint Software
- Cisco RoomOS Software
📦 What is this software?
Roomos by Cisco
Telepresence Collaboration Endpoint by Cisco
View all CVEs affecting Telepresence Collaboration Endpoint →
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with root access, allowing persistent backdoors, data exfiltration, and lateral movement within the network.
Likely Case
Unauthorized configuration changes leading to service disruption, data leakage, or use as pivot point for further attacks.
If Mitigated
Limited to authorized administrators only, reducing risk to insider threats or compromised admin accounts.
🎯 Exploit Status
Exploitation requires administrative credentials but is straightforward once authenticated. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Cisco Security Advisory for specific fixed versions per product
Vendor Advisory: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tp-cmd-inj-7ZpWhvZb
Restart Required: Yes
Instructions:
1. Review Cisco Security Advisory for affected products. 2. Download appropriate firmware updates from Cisco Software Center. 3. Backup device configuration. 4. Apply firmware update via web interface or CLI. 5. Reboot device. 6. Verify update successful.
🔧 Temporary Workarounds
Restrict Administrative Access
allLimit administrative access to trusted networks and implement strict access controls
Disable Unused Interfaces
allDisable console, SSH, or web API interfaces if not required for operations
🧯 If You Can't Patch
- Implement network segmentation to isolate affected devices
- Enforce strict access controls and monitor administrative activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Cisco Security Advisory. Devices running versions prior to fixed releases are vulnerable.Check Version:
xStatus SystemUnit ProductId (via SSH or API) or check web interface System InformationVerify Fix Applied:
Verify firmware version matches or exceeds fixed version listed in Cisco Security Advisory📡 Detection & Monitoring
Log Indicators:
- Unusual administrative login patterns
- Multiple failed upgrade attempts
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from collaboration devices
- Anomalous SSH or API traffic patterns
SIEM Query:
source="cisco-telepresence" AND (event_type="upgrade_failed" OR event_type="config_change")