sshd's and ssh's arcfour ciphers appear to be broken on MIC (mpss 3.1.2)

[Eric_B_]

Not a bit deal, but for your awareness.

It appears that the arcfour family of ciphers are broken for ssh/sshd on mpss 3.1.2. Below you can see attempts from host->mic and mic->itself with and without the arcfour cipher selected. (Wasn't broken on the last version (2.1.6720-15) I had running.)

[user@host ~]$ ssh -c arcfour mic0 # broken (host -> mic)
Bad packet length 31885329.
Disconnecting: Packet corrupt
[user@host ~]$ ssh mic0  # works (host -> mic)
[user@host-mic0 ~]$ ssh -c arcfour mic0 # broken (mic -> self)
Bad packet length 3193176100.
Disconnecting: Packet corrupt
[user@host-mic0 ~]$ ssh mic0 # works (mic -> self)
[user@host-mic0 ~]$ exit

logout
Connection to mic0 closed.

[user@host-mic0 ~]$ exit

logout
Connection to mic0 closed.

[user@host ~]$

[Loc_N_Intel]

Hi Eric,

I confirm that using ssh with arcfour doesn't work starting in MPSS 3.1 (Yocto-based). I will report this issue to MPSS team. Thank you very much. 

[Loc_N_Intel]

For your information, this issue has been reported (ID 4868234). Thank you.