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PASSEDvendor / paloalto_url_filtering_db_corruption
Palo Alto URL Filtering Database Corruption
The PA-3260 URL filtering database becomes corrupted during an update, causing all web traffic to be categorized as 'not-resolved' and bypassing URL filtering policies entirely.
Pattern
UNKNOWN
Severity
CRITICAL
Confidence
95%
Remediation
Remote Hands
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | UNKNOWN | UNKNOWN | |
| Severity Assessment | CRITICAL | CRITICAL | |
| Incident Correlation | Yes | 18 linked | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Remote Hands — Corax contacts on-site support via call, email, or API |
Scenario Conditions
PA-3260 with URL Filtering subscription (PAN-DB). Database corruption during update at 4AM. All URLs categorized as 'not-resolved'. URL filtering policy allows 'not-resolved' category. 800 users browsing unfiltered.
Injected Error Messages (2)
palo alto URL filtering database corrupted on PA-3260 — PAN-DB seed file failed integrity check during 04:00 update, all URL lookups returning 'not-resolved' category, palo alto url filtering policy permitting all web traffic due to 'not-resolved' action: allow, web content filtering completely bypassed for 800 users
palo alto PA-3260 URL filtering non-functional — PAN-DB cloud lookup failing with database CRC mismatch, local URL cache corrupted, palo alto url-filtering log showing 100% 'not-resolved' verdicts (normal baseline: 2%), content filtering policy ineffective, users accessing blocked categories without restriction
Neural Engine Root Cause Analysis
The Palo Alto PA-3260 firewall's URL filtering database (PAN-DB) has become corrupted due to a failed integrity check during the scheduled 04:00 update process. This corruption is causing all URL lookups to return 'not-resolved' category, which triggers the configured allow action, effectively bypassing all web content filtering for 800 users. The 10 correlated incidents within the same timeframe suggest either a cascading failure from this critical security control failure or a shared infrastructure issue affecting multiple systems.
Remediation Plan
1. Immediately access Palo Alto PA-3260 management interface to confirm PAN-DB status and corruption details. 2. Stop automatic PAN-DB updates to prevent further corruption. 3. Clear the corrupted PAN-DB cache and seed files from the system. 4. Manually download and install a fresh PAN-DB seed file from Palo Alto Networks update servers. 5. Verify database integrity and perform test URL lookups to confirm proper categorization. 6. Re-enable automatic updates and monitor for proper operation. 7. Review and potentially adjust URL filtering policy to use 'block' action for 'not-resolved' categories to prevent future security bypasses.
Tested: 2026-03-30Monitors: 2 | Incidents: 2Test ID: cmnck4o6006ouobqevb9amrui