Bug ID 1036013: BIG-IP systems may terminate connections prematurely when a TLS close-notify alert is received

Last Modified: Sep 23, 2021

Bug Tracker

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

Known Affected Versions:
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, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0

Opened: Jul 24, 2021
Severity: 3-Major

Symptoms

When a backend server sends a TLS close-notify alert, BIG-IP may terminate the connection prematurely without forwarding the HTTP response.

Impact

Server responses may be dropped.

Conditions

ServerSSL receives a TLS Close-notify alert after a TLSv1.3 session is established.

Workaround

Use TLSv1.2.

Fix Information

None

Behavior Change