Bug ID 797813: TMM memory grows on custom bot signature with empty domain

Last Modified: Jan 10, 2023

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,

Opened: Jun 25, 2019
Severity: 3-Major


The TMM memory of type 'mco db' can grow to its maximum, which can reach over a 1 GB of RAM, when creating a custom bot signature with an empty string.


Unnecessary growth of TMM memory.


Creating a custom DoS Bot Signature object with a domain name of an empty string ("").


It is redundant and invalid to define a bot signature with an empty domain name. Removing the empty domain name from the signature and restarting tmm prevents this issue.

Fix Information


Behavior Change