Last Modified: Jul 24, 2020
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BIG-IP ASM, LTM
Known Affected Versions:
Opened: Sep 12, 2019
Sometimes when HTTP server receives a POST request, it can serve a response prior the whole request payload is arrived. When a response is chunked in some occasions TMM may fail to process it correctly.
TMM cores, failover condition occurs, and traffic processing can be interrupted while tmm restarts.
-- The BIG-IP system has a virtual server configured with HTTP profile. -- POST request is processing. -- A chunked response is served before the whole request is received. -- A Security Policy is applied to the virtual server.
The BIG-IP system now properly handles early chunked responses and does not allow TMM to core for this reason.