Bug ID 1037457: High CPU during specific dos mitigation

Last Modified: Nov 07, 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,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5, 16.1.0, 16.1.1, 16.1.2,

Fixed In:
17.0.0,,,, 13.1.5

Opened: Jul 29, 2021
Severity: 3-Major


CPU is high.


While the attack is mitigated on the BIG-IP system and does not reach the server, the CPU of the BIG-IP increases and this may impact other services on the BIG-IP device.


A dos attack with specific characteristic is active and the policy is configured in a specific way.



Fix Information

A specific high CPU scenario during dos attacks was fixed.

Behavior Change