Bug ID 554977: TMM might crash on failed SSL handshake

Last Modified: Feb 13, 2019

Bug Tracker

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

Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1

Fixed In:
11.5.4 HF2

Opened: Oct 29, 2015
Severity: 3-Major
Related AskF5 Article:
K64401960

Symptoms

SSL handshake failures may crash in ssl_verify().

Impact

Traffic disrupted while tmm restarts.

Conditions

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

Workaround

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