The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtain the following information via sniffing: (1) password lengths or ranges of lengths, which simplifies brute force password guessing, (2) whether RSA or DSA authentication is being used, (3) the number of authorized_keys in RSA authentication, or (4) the lengths of shell commands.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssh | Openbsd | 4.5 | 4.5 |
| Ssh | Ssh | 1.2.24 | 1.2.24 |
| Ssh | Ssh | 1.2.25 | 1.2.25 |
| Ssh | Ssh | 1.2.26 | 1.2.26 |
| Ssh | Ssh | 1.2.27 | 1.2.27 |
| Ssh | Ssh | 1.2.28 | 1.2.28 |
| Ssh | Ssh | 1.2.29 | 1.2.29 |
| Ssh | Ssh | 1.2.30 | 1.2.30 |
| Ssh | Ssh | 1.2.31 | 1.2.31 |