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 (including) | 4.5 (including) |
| Ssh | Ssh | 1.2.24 (including) | 1.2.24 (including) |
| Ssh | Ssh | 1.2.25 (including) | 1.2.25 (including) |
| Ssh | Ssh | 1.2.26 (including) | 1.2.26 (including) |
| Ssh | Ssh | 1.2.27 (including) | 1.2.27 (including) |
| Ssh | Ssh | 1.2.28 (including) | 1.2.28 (including) |
| Ssh | Ssh | 1.2.29 (including) | 1.2.29 (including) |
| Ssh | Ssh | 1.2.30 (including) | 1.2.30 (including) |
| Ssh | Ssh | 1.2.31 (including) | 1.2.31 (including) |
| Red Hat Linux 7.0 | RedHat | * |