For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Sabir_Alvi's avatar
Sabir_Alvi
Icon for Altocumulus rankAltocumulus
Feb 16, 2018

Bigip 11.2.1 - weak ciphers

I have BiGIP 11.2.1 in my test lab and below Cipher suite for SSL profile:   TLSv1_2:!SSLv3:!RC4-SHA:!3DES:!DH:!ADH:!EDH:!MD5:!EXPORT:!DES:@STRENGTH   However there are few open weak ciphers wh...
application delivery
BIG-IP
cipher
LTM
ssl
tls
JoshBecigneul's avatar
JoshBecigneul
Icon for MVP rankMVP
Feb 16, 2018

So the RSA cipher suite is being deprecated by testing tools like SSLLabs as they don't provide Forward Secrecy: SSL Labs Grading Update: Forward Secrecy, Authenticated Encryption and ROBOT

 

Running a version such as 11.2.1 in a production scenario raises so many more questions other than "how do I block this cipher?". There are a significant amount of vulnerabilities that have been discovered since this version was released, that have been fixed in later versions.

 

I would recommend patching to a later supported release at your earliest opportunity.

 

To answer your question, you could probably disable them, but I don't think that would leave all that many options for usable ciphers. You should test this thoroughly.