Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP ASM, LTM
Known Affected Versions:
15.0.1
Fixed In:
15.1.0, 15.0.1.1
Opened: Sep 12, 2019 Severity: 2-Critical
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.
None.
The BIG-IP system now properly handles early chunked responses and does not allow TMM to core for this reason.