Proactive Defence module can lead to 503 errors / segmentation faults

Incident Report for Imunify360

Resolved

This incident has been resolved.
Posted Aug 19, 2025 - 12:26 UTC

Monitoring

This issue has been fixed (released the fixed rules for ProactiveDefense, updates automatically every 30 minutes)
The PD module can be switched back on, and the rules can be forced to update for immediate application:
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imunify360-agent update proactive --force
imunify360-agent config update '{"PROACTIVE_DEFENCE": {"blamer": true, "mode": "ENABLED", "php_immunity": true}}'
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Posted Aug 19, 2025 - 12:25 UTC

Identified

The issue has been identified and a fix is being implemented.
Posted Aug 19, 2025 - 11:20 UTC

Investigating

The case is under investigation, and our developers have been notified. (internal case ID DEF-35767)
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Affected version:

imunify360-php-daemon|8.4.5-1
imunify360-php-i360|8.4.5-1
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As a temporary solution PD module can be disabled at all:
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imunify360-agent config update '{"PROACTIVE_DEFENCE": {"blamer": false, "mode": "DISABLED", "php_immunity": false}}'
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Posted Aug 19, 2025 - 10:08 UTC
This incident affected: ProactiveDefence.