Last Modified: Oct 06, 2020
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BIG-IP AFM, ASM
Known Affected Versions:
Opened: Oct 10, 2017
The number of the signatures per virtual server is not limited. This can result in a very large number of generated signatures during sophisticated attacks that use changing patterns. After a time, when a system experiences a number of attacks, the list of generated signatures can be too long.
High CPU utilization when mitigating. Overloaded GUI signatures screen.
-- Sophisticated attacks that use changing patterns. -- System experiences a large number of attacks.
Manually remove old / not-often-used signatures.
The system now limits the number of signatures per virtual servers, and optimizes per-signatures operation.