Bug ID 757446: Invoking the HTTP::respond iRule command when the HTTP2 profile is present can cause stalled or malformed responses.

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,

Fixed In:
15.0.0,, 13.1.5

Opened: Feb 02, 2019

Severity: 3-Major


The BIG-IP system stalls a connection instead of sending the intended HTTP response, or sends a malformed response.


Clients do not get the expected responses, leading to application failures.


This issue occurs when all of the following conditions are met: -- The virtual server uses the http2 profile. -- The virtual server uses an iRule that invokes the HTTP::respond command under the HTTP_REQUEST or HTTP_RESPONSE event.



Fix Information

The HTTP::respond iRule command works as expected under these conditions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips