We have done some security scann on UCS server for SSH Audit. We were using https://github.com/jtesta/ssh-audit for scanning 

after custom MACs and KexAlgorithms there are still problems with gss kex Algorithms. 

The report: 

# key exchange algorithms
(kex) gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==      -- [warn] using weak hashing algorithm
(kex) gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==   -- [fail] using small 1024-bit modulus
                                                 `- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
                                                 `- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
                                                 `- [warn] using weak hashing algorithm
(kex) gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==  -- [warn] using weak hashing algorithm

Here i don't have know-how to search for problem, i hope that would be fixed with update to 5.1