Bug ID 910105: Partial HTTP/2 payload may freeze on the BIG-IP system

Last Modified: Jun 08, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3

Opened: May 18, 2020
Severity: 3-Major

Symptoms

HTTP/2 allows sending the payload in both directions gradually, until a frame with an END_STREAM flag closes a direction. The BIG-IP does not properly handles an early response from a server when HTTP router is configured on a virtual and partial payload sent in each direction. In this case, communication over the stream hangs.

Impact

A response with a partial payload is not delivered to a client. Communication freezes on that specific stream.

Conditions

-- Virtual server is configured on the BIG-IP system with HTTP and HTTP/2 profiles on both the client and server sides. -- HTTP router profile is configured on the virtual server. -- Client sends a request and delivers a partial payload, waiting for a response from a server. -- Server responds with a partial payload.

Workaround

None.

Fix Information

None

Behavior Change