Bug ID 485188: Support for TLS_FALLBACK_SCSV

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
10.2.4, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 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, 11.6.0, 11.6.0 HF1, 11.6.0 HF2

Fixed In:
12.0.0, 11.6.0 HF3, 11.5.1 HF6, 11.5.0 HF6, 11.4.1 HF6, 11.4.0 HF9, 11.2.1 HF13, 10.2.4 HF10

Opened: Oct 17, 2014
Severity: 3-Major
Related AskF5 Article:
K16935

Symptoms

Virtual servers configured with a Client SSL profile do not support the Transport Layer Security (TLS) Fallback Signaling Cipher Suite Value (SCSV) in Secure Sockets Layer (SSL) ClientHello transactions.

Impact

N/A

Conditions

N/A

Workaround

None

Fix Information

When the SSL ClientHello contains the SCSV marker, if the client protocol offered is not the latest that the virtual server supports, a fatal alert will be sent. For more information, see SOL16935: Support for the TLS Fallback SCSV https://support.f5.com/kb/en-us/solutions/public/16000/900/sol16935.html

Behavior Change