CVE-2025-20295
📋 TL;DR
This vulnerability in Cisco UCS Manager CLI allows authenticated administrators to read, create, or overwrite any file on the underlying operating system due to insufficient input validation. Attackers with administrative credentials can exploit this to compromise system integrity. Only Cisco UCS Manager installations with local administrative access are affected.
💻 Affected Systems
- Cisco UCS Manager
⚠️ 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 system compromise through arbitrary file overwrite, allowing privilege escalation, persistence, or system destruction
Likely Case
Unauthorized file access or modification leading to data theft, configuration changes, or service disruption
If Mitigated
Limited impact due to proper access controls and monitoring of administrative activities
🎯 Exploit Status
Requires authenticated administrative access; exploitation involves crafting specific CLI command arguments
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco Security Advisory for specific fixed versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-multi-cmdinj-E4Ukjyrz
Restart Required: No
Instructions:
1. Review Cisco Security Advisory for affected versions. 2. Upgrade to recommended fixed version. 3. Apply patch following Cisco's upgrade procedures.
🔧 Temporary Workarounds
Restrict Administrative Access
allLimit administrative access to trusted personnel only and implement strict access controls
Monitor Administrative Activities
allImplement comprehensive logging and monitoring of all administrative CLI sessions
🧯 If You Can't Patch
- Implement strict least-privilege access controls for administrative accounts
- Enable detailed audit logging of all CLI commands and file system operations
🔍 How to Verify
Check if Vulnerable:
Check Cisco UCS Manager version against affected versions in Cisco Security AdvisoryCheck Version:
show version (Cisco UCS Manager CLI)Verify Fix Applied:
Verify version is updated to fixed version listed in Cisco advisory📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns by administrative users
- Suspicious CLI command arguments
- Unexpected file creation/modification
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
Search for administrative CLI sessions with unusual command patterns or file system operations