Bug ID 554977: TMM might crash on failed SSL handshake

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.5.4, 11.5.3, 11.5.2, 11.5.1, 11.5.0

Fixed In:
11.5.4 HF2

Opened: Oct 29, 2015
Severity: 3-Major
Related AskF5 Article:


SSL handshake failures may crash in ssl_verify().


Traffic disrupted while tmm restarts.


Certain types of failed SSL handshakes in versions 11.5.0 through 11.5.4.


Modifying serverssl cipher string to exclude ECDHE_RSA and ECDHE_ECDSA might help prevent the crash.

Fix Information

This release fixes a TMM crash that might be encountered during the SSL handshake.

Behavior Change