CVE-2025-13225
📋 TL;DR
CVE-2025-13225 is an arbitrary file deletion vulnerability in TanOS that allows authenticated attackers to delete files they shouldn't have access to. This affects Tanium deployments running vulnerable versions of TanOS. The vulnerability requires authentication but could lead to service disruption or data loss.
💻 Affected Systems
- Tanium TanOS
📦 What is this software?
Tanos by Tanium
Tanos by Tanium
⚠️ Risk & Real-World Impact
Worst Case
Critical system files could be deleted, causing complete service disruption, data loss, or system instability requiring full restoration from backups.
Likely Case
Attackers delete configuration files, logs, or application data causing service degradation, audit trail loss, or operational disruption.
If Mitigated
With proper access controls and monitoring, impact is limited to non-critical files with quick detection and restoration.
🎯 Exploit Status
Exploitation requires authenticated access but the file deletion operation itself is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Tanium advisory TAN-2025-036 for specific patched versions
Vendor Advisory: https://security.tanium.com/TAN-2025-036
Restart Required: Yes
Instructions:
1. Review Tanium advisory TAN-2025-036. 2. Download and apply the TanOS patch from Tanium support portal. 3. Restart TanOS services as required. 4. Verify patch application.
🔧 Temporary Workarounds
Restrict TanOS Access
allLimit access to TanOS interface to only necessary administrative users
Implement File Integrity Monitoring
linuxMonitor critical TanOS files for unauthorized changes or deletions
# Example using AIDE on Linux
# aide --init
# mv /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
# aide --check
🧯 If You Can't Patch
- Implement strict access controls and multi-factor authentication for TanOS administrative access
- Enable comprehensive logging and monitoring of file deletion operations on TanOS systems
🔍 How to Verify
Check if Vulnerable:
Check TanOS version against affected versions listed in Tanium advisory TAN-2025-036Check Version:
# On TanOS system
tanium versionVerify Fix Applied:
Verify TanOS version matches patched version from advisory and test file deletion permissions📡 Detection & Monitoring
Log Indicators:
- Unexpected file deletion events in TanOS logs
- Multiple failed file access attempts followed by successful deletions
Network Indicators:
- Unusual patterns of administrative access to TanOS interface
SIEM Query:
source="tanos*" AND (event_type="file_delete" OR action="delete") AND user!="expected_admin_user"