Bug ID 807569: Requests fail to load when backend server overrides request cookies and Bot Defense is used

Last Modified: Jan 14, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP ASM(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,,,,,,,,, 14.1.3,, 14.1.4,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,

Opened: Jul 20, 2019
Severity: 4-Minor


When Bot Defense is used on the backend server that overrides request cookies, requests to non-HTML resources may fail, or may receive the whitepage JavaScript challenge. An example is when a back-end server responds with a Set-Cookie header containing empty values for each cookie request cookie it does not recognize.


Some URLs fail to load following the JavaScript challenge.


-- Bot Defense is enabled. -- Backend server is overriding the Bot Defense cookies with the TS prefix.


Use an iRule to strip the TSPD_101 cookie from the request before forwarding it to the backend: when HTTP_REQUEST_RELEASE { HTTP::cookie remove "TSPD_101" }

Fix Information


Behavior Change