Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.1
Fixed In:
13.0.0, 12.1.2
Opened: Aug 08, 2016 Severity: 2-Critical
When a client performs an abbreviated handshake by reusing the session from a previously established full handshake, the SSL forward proxy does not raise the CLIENTSSL_SERVERHELLO_SEND event.
iRule commands inside of the CLIENTSSL_SERVERHELLO_SEND are only executed for full handshakes but not for abbreviated handshakes; thus any logic that's applied per SSL connection should not run inside of CLIENTSSL_SERVERHELLO_SEND event since it is not reliably raised under all types of handshakes.
This occurs when the following conditions are met: -- SSL forward proxy configured -- Session cache is enabled.
To make sure that the CLIENTSSL_SERVERHELLO_SEND event is reliably raised, disable session cache in the client SSL profile.
None