ssh 2.0.12, and possibly other versions, allows valid user names to attempt to enter the correct password multiple times, but only prompts an invalid user name for a password once, which allows remote attackers to determine user account names on the server.
| Software | From | Fixed in |
|---|---|---|
| ssh / ssh2 | 2.0 | 2.0.x |
| ssh / ssh2 | 2.0.1 | 2.0.1.x |
| ssh / ssh2 | 2.0.10 | 2.0.10.x |
| ssh / ssh2 | 2.0.11 | 2.0.11.x |
| ssh / ssh2 | 2.0.12 | 2.0.12.x |
| ssh / ssh2 | 2.0.2 | 2.0.2.x |
| ssh / ssh2 | 2.0.3 | 2.0.3.x |
| ssh / ssh2 | 2.0.4 | 2.0.4.x |
| ssh / ssh2 | 2.0.5 | 2.0.5.x |
| ssh / ssh2 | 2.0.6 | 2.0.6.x |
| ssh / ssh2 | 2.0.7 | 2.0.7.x |
| ssh / ssh2 | 2.0.8 | 2.0.8.x |
| ssh / ssh2 | 2.0.9 | 2.0.9.x |