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@mattfoster mattfoster/ssh-audit
Created Apr 23, 2017

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ssh-audit scan-me.nmap.org
% ssh-audit scan-me.nmap.org
# general
(gen) banner: SSH-2.0-OpenSSH_6.6.1
(gen) software: OpenSSH 6.6.1
(gen) compatibility: OpenSSH 6.5-6.6, Dropbear SSH 2013.62+ (some functionality from 0.52)
(gen) compression: enabled (zlib@openssh.com)
# key exchange algorithms
(kex) curve25519-sha256@libssh.org -- [info] available since OpenSSH 6.5, Dropbear SSH 2013.62
(kex) ecdh-sha2-nistp256 -- [fail] using weak elliptic curves
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(kex) ecdh-sha2-nistp384 -- [fail] using weak elliptic curves
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(kex) ecdh-sha2-nistp521 -- [fail] using weak elliptic curves
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(kex) diffie-hellman-group-exchange-sha256 -- [warn] using custom size modulus (possibly weak)
`- [info] available since OpenSSH 4.4
(kex) diffie-hellman-group-exchange-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
(kex) diffie-hellman-group1-sha1 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [fail] disabled (in client) since OpenSSH 7.0, logjam attack
`- [warn] using small 1024-bit modulus
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
# host-key algorithms
(key) ssh-rsa -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ecdsa-sha2-nistp256 -- [fail] using weak elliptic curves
`- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(key) ssh-ed25519 -- [info] available since OpenSSH 6.5
# encryption algorithms (ciphers)
(enc) aes128-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
(enc) aes192-ctr -- [info] available since OpenSSH 3.7
(enc) aes256-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
(enc) arcfour256 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher
`- [info] available since OpenSSH 4.2
(enc) arcfour128 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher
`- [info] available since OpenSSH 4.2
(enc) aes128-gcm@openssh.com -- [info] available since OpenSSH 6.2
(enc) aes256-gcm@openssh.com -- [info] available since OpenSSH 6.2
(enc) chacha20-poly1305@openssh.com -- [info] available since OpenSSH 6.5
`- [info] default cipher since OpenSSH 6.9.
(enc) aes128-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak cipher mode
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28
(enc) 3des-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak cipher
`- [warn] using weak cipher mode
`- [warn] using small 64-bit block size
`- [info] available since OpenSSH 1.2.2, Dropbear SSH 0.28
(enc) blowfish-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [fail] disabled since Dropbear SSH 0.53
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher mode
`- [warn] using small 64-bit block size
`- [info] available since OpenSSH 1.2.2, Dropbear SSH 0.28
(enc) cast128-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher mode
`- [warn] using small 64-bit block size
`- [info] available since OpenSSH 2.1.0
(enc) aes192-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak cipher mode
`- [info] available since OpenSSH 2.3.0
(enc) aes256-cbc -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak cipher mode
`- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.47
(enc) arcfour -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher
`- [info] available since OpenSSH 2.1.0
(enc) rijndael-cbc@lysator.liu.se -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak cipher mode
`- [info] available since OpenSSH 2.3.0
# message authentication code algorithms
(mac) hmac-md5-etm@openssh.com -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 6.2
(mac) hmac-sha1-etm@openssh.com -- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 6.2
(mac) umac-64-etm@openssh.com -- [warn] using small 64-bit tag size
`- [info] available since OpenSSH 6.2
(mac) umac-128-etm@openssh.com -- [info] available since OpenSSH 6.2
(mac) hmac-sha2-256-etm@openssh.com -- [info] available since OpenSSH 6.2
(mac) hmac-sha2-512-etm@openssh.com -- [info] available since OpenSSH 6.2
(mac) hmac-ripemd160-etm@openssh.com -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [info] available since OpenSSH 6.2
(mac) hmac-sha1-96-etm@openssh.com -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 6.2
(mac) hmac-md5-96-etm@openssh.com -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 6.2
(mac) hmac-md5 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using encrypt-and-MAC mode
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28
(mac) hmac-sha1 -- [warn] using encrypt-and-MAC mode
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28
(mac) umac-64@openssh.com -- [warn] using encrypt-and-MAC mode
`- [warn] using small 64-bit tag size
`- [info] available since OpenSSH 4.7
(mac) umac-128@openssh.com -- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 6.2
(mac) hmac-sha2-256 -- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 5.9, Dropbear SSH 2013.56
(mac) hmac-sha2-512 -- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 5.9, Dropbear SSH 2013.56
(mac) hmac-ripemd160 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 2.5.0
(mac) hmac-ripemd160@openssh.com -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 2.1.0
(mac) hmac-sha1-96 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using encrypt-and-MAC mode
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.47
(mac) hmac-md5-96 -- [fail] removed (in server) since OpenSSH 6.7, unsafe algorithm
`- [warn] disabled (in client) since OpenSSH 7.2, legacy algorithm
`- [warn] using encrypt-and-MAC mode
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.5.0
# algorithm recommendations (for OpenSSH 6.6.1)
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove
(rec) -diffie-hellman-group-exchange-sha1 -- kex algorithm to remove
(rec) -diffie-hellman-group1-sha1 -- kex algorithm to remove
(rec) -ecdh-sha2-nistp256 -- kex algorithm to remove
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove
(rec) -ecdh-sha2-nistp384 -- kex algorithm to remove
(rec) -ecdsa-sha2-nistp256 -- key algorithm to remove
(rec) -arcfour -- enc algorithm to remove
(rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove
(rec) -blowfish-cbc -- enc algorithm to remove
(rec) -3des-cbc -- enc algorithm to remove
(rec) -aes256-cbc -- enc algorithm to remove
(rec) -arcfour256 -- enc algorithm to remove
(rec) -cast128-cbc -- enc algorithm to remove
(rec) -aes192-cbc -- enc algorithm to remove
(rec) -arcfour128 -- enc algorithm to remove
(rec) -aes128-cbc -- enc algorithm to remove
(rec) -hmac-sha2-512 -- mac algorithm to remove
(rec) -hmac-md5-96 -- mac algorithm to remove
(rec) -hmac-md5-etm@openssh.com -- mac algorithm to remove
(rec) -hmac-sha1-96-etm@openssh.com -- mac algorithm to remove
(rec) -hmac-ripemd160-etm@openssh.com -- mac algorithm to remove
(rec) -hmac-md5-96-etm@openssh.com -- mac algorithm to remove
(rec) -hmac-sha2-256 -- mac algorithm to remove
(rec) -hmac-ripemd160 -- mac algorithm to remove
(rec) -umac-128@openssh.com -- mac algorithm to remove
(rec) -hmac-sha1-96 -- mac algorithm to remove
(rec) -umac-64@openssh.com -- mac algorithm to remove
(rec) -hmac-md5 -- mac algorithm to remove
(rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove
(rec) -hmac-sha1 -- mac algorithm to remove
(rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove
(rec) -umac-64-etm@openssh.com -- mac algorithm to remove
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