Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP ASM
Known Affected Versions:
12.1.0, 12.1.1, 12.1.2
Fixed In:
12.1.3
Opened: Mar 09, 2017 Severity: 3-Major Related Article:
K53010710
When PBD and FP are both enabled, there is a very high client-side latency, especially on Microsoft Internet Explorer version 11 (IE11). On IE11, sometimes the challenge remains on a blank page, never moving on to the site from the back-end server.
Delay or blank page when clients access the page using IE11.
This issue occurs when the following conditions are met: -- Your BIG-IP system has Proactive Bot Defense and fingerprinting enabled. -- The client is using IEll. Note: IE11 is known to be affected by this issue. However, other browsers may also be affected.
None
Improved the client-side run-time of the JavaScript challenge and prevented it from getting stuck on Internet Explorer.