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JamieMagee/SSH Audit

Created October 17, 2016 13:32
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SSH Audit
# general
(gen) banner: SSH-2.0-dropbear_2016.74
(gen) software: Dropbear SSH 2016.74
(gen) compatibility: OpenSSH 6.5-6.6, Dropbear SSH 2013.62-2014.66
(gen) compression: disabled
# key exchange algorithms
(kex) curve25519-sha256@libssh.org -- [info] available since OpenSSH 6.5, Dropbear SSH 2013.62
(kex) ecdh-sha2-nistp521 -- [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-nistp256 -- [fail] using weak elliptic curves
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(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
(kex) kexguess2@matt.ucc.asn.au -- [info] available since Dropbear SSH 2013.57
# host-key algorithms
(key) ecdsa-sha2-nistp521 -- [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-rsa -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
(key) ssh-dss -- [fail] removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm
`- [warn] using small 1024-bit modulus
`- [warn] using weak random number generator could reveal the key
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28
# encryption algorithms (ciphers)
(enc) aes128-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
(enc) aes256-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
(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) 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) twofish256-cbc -- [fail] disabled since Dropbear SSH 2015.67
`- [warn] using weak cipher mode
`- [info] available since Dropbear SSH 0.47
(enc) twofish-cbc -- [fail] disabled since Dropbear SSH 2015.67
`- [warn] using weak cipher mode
`- [info] available since Dropbear SSH 0.28
(enc) twofish128-cbc -- [fail] disabled since Dropbear SSH 2015.67
`- [warn] using weak cipher mode
`- [info] available since Dropbear SSH 0.47
(enc) 3des-ctr -- [info] available since Dropbear SSH 0.52
(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
# message authentication code algorithms
(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-sha1 -- [warn] using encrypt-and-MAC mode
`- [warn] using weak hashing algorithm
`- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28
(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-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
# algorithm recommendations (for Dropbear SSH 2016.74)
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove
(rec) -ecdh-sha2-nistp384 -- kex algorithm to remove
(rec) -ecdh-sha2-nistp256 -- kex algorithm to remove
(rec) -diffie-hellman-group1-sha1 -- kex algorithm to remove
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove
(rec) +diffie-hellman-group16-sha512-- kex algorithm to append
(rec) +diffie-hellman-group14-sha256-- kex algorithm to append
(rec) -ecdsa-sha2-nistp521 -- key algorithm to remove
(rec) -ssh-dss -- key algorithm to remove
(rec) -twofish128-cbc -- enc algorithm to remove
(rec) -twofish256-cbc -- enc algorithm to remove
(rec) -3des-cbc -- enc algorithm to remove
(rec) -aes256-cbc -- enc algorithm to remove
(rec) -twofish-cbc -- enc algorithm to remove
(rec) -aes128-cbc -- enc algorithm to remove
(rec) +twofish256-ctr -- enc algorithm to append
(rec) +twofish128-ctr -- enc algorithm to append
(rec) -hmac-sha1 -- mac algorithm to remove
(rec) -hmac-sha1-96 -- mac algorithm to remove
(rec) -hmac-md5 -- mac algorithm to remove
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