Bug ID 883133: TLS_FALLBACK_SCSV with TLS1.3

Last Modified: Sep 14, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
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, 14.1.5.3, 14.1.5.4, 14.1.5.6, 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, 15.1.8, 15.1.8.1, 15.1.8.2

Fixed In:
16.1.0, 15.1.9

Opened: Feb 20, 2020

Severity: 3-Major

Symptoms

Possible handshake failure with some combinations of TLS Fallback Signaling Cipher Suite Value (SCSV) and SSL profile protocol versions.

Impact

Possible handshake failure.

Conditions

-- Using fallback SCSV suites. -- Using certain client SSL profile protocol versions (e.g., the virtual server is configured for TLS1.3, and the client is configured for TLS1.0 - TLS1.2).

Workaround

None.

Fix Information

The BIG-IP system now correctly handles all combinations of fallback SCSV and supported protocol versions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips