CVE-2025-20349
📋 TL;DR
This vulnerability allows authenticated attackers with at least Observer role credentials to execute arbitrary commands as root in a restricted container on Cisco Catalyst Center. The issue stems from insufficient input validation in REST API parameters. Organizations using vulnerable versions of Cisco Catalyst Center are affected.
💻 Affected Systems
- Cisco Catalyst Center
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Catalyst Center appliance, allowing root-level command execution, data exfiltration, lateral movement to connected network devices, and persistence establishment.
Likely Case
Unauthorized command execution leading to configuration changes, data access, or service disruption within the restricted container environment.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and minimal user accounts with Observer or higher privileges.
🎯 Exploit Status
Exploitation requires valid credentials but is straightforward once authenticated; no public exploit code known at this time
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific fixed versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnac-ci-ZWLQVSwT
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions 2. Download and apply the appropriate patch 3. Restart the Catalyst Center service 4. Verify patch installation
🔧 Temporary Workarounds
Restrict API Access
allLimit REST API access to trusted IP addresses only
Configure network ACLs to restrict access to Catalyst Center API endpoints
Privilege Reduction
allMinimize number of accounts with Observer or higher privileges
Review and remove unnecessary privileged accounts
Implement least privilege principle
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Catalyst Center from critical systems
- Enable detailed logging and monitoring of all API requests, especially those with command-like parameters
🔍 How to Verify
Check if Vulnerable:
Check Catalyst Center version against affected versions in Cisco advisoryCheck Version:
Check Catalyst Center web interface or CLI for version informationVerify Fix Applied:
Verify installed version matches or exceeds fixed version from advisory📡 Detection & Monitoring
Log Indicators:
- Unusual API requests with command-like parameters
- Multiple failed authentication attempts followed by successful login
- Unexpected process execution in container logs
Network Indicators:
- Unusual outbound connections from Catalyst Center appliance
- API requests containing shell metacharacters or command injection patterns
SIEM Query:
source="catalyst_center" AND (event_type="api_request" AND (param CONTAINS "|" OR param CONTAINS ";" OR param CONTAINS "$" OR param CONTAINS "`"))