Bug ID 590578: False positive "URL error" alerts on URLs with GET parameters

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1

Fixed In:
13.0.0, 12.1.2, 12.1.1 HF2, 12.1.1 HF1

Opened: May 01, 2016
Severity: 3-Major


False-positive URL Error alerts are sometimes generated on URLs with GET parameters.


Unwanted alerts in alert server.


Use of URLs with GET parameters.



Fix Information

Hash calculation is done on slightly different URL inputs, causing mismatch.

Behavior Change