Bug ID 1109953: TMM may crash if a data-group is used when an SSL Forward Proxy Bypass/Intercept list contains extremely long entry

Last Modified: Sep 29, 2022

Bug Tracker

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2

Opened: May 26, 2022
Severity: 3-Major

Symptoms

A very long entry (exceeding the maximum length allowed by internet stndards) in a data-group used for SSL Forward Proxy Bypass/Intercept hostname list may cause TMM to crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

All of the below conditions have to be met: -- A virtual server uses SSL profile -- This SSL profile has Forward Proxy enabled. -- The SSL profile has Forward Proxy Bypass enabled. -- The SSL profile uses Hostname Bypass and/or Hostname Intercept data-group. -- Anny to the data-groups contains entries which are longer than 255 characters.

Workaround

Make sure all entries in the data-group used for intercept/bypass hostnanme list do not exceed 255 characters. According to RFC 1035 section 2.3.4, longer hostnames are not valid.

Fix Information

None

Behavior Change