The IDEA cipher as implemented by SSH1 does not protect the final block of a message against modification, which allows remote attackers to modify the block without detection by changing its cyclic redundancy check (CRC) to match the modifications to the message.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| 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) |