The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a Client: Diffie-Hellman Key Exchange Init packet.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libssh | Libssh | * | 0.5.3 (including) |
| Libssh | Libssh | 0.4.7 (including) | 0.4.7 (including) |
| Libssh | Libssh | 0.4.8 (including) | 0.4.8 (including) |
| Libssh | Libssh | 0.5.0 (including) | 0.5.0 (including) |
| Libssh | Libssh | 0.5.0-rc1 (including) | 0.5.0-rc1 (including) |
| Libssh | Libssh | 0.5.1 (including) | 0.5.1 (including) |
| Libssh | Libssh | 0.5.2 (including) | 0.5.2 (including) |
| Libssh | Ubuntu | devel | * |
| Libssh | Ubuntu | hardy | * |
| Libssh | Ubuntu | lucid | * |
| Libssh | Ubuntu | oneiric | * |
| Libssh | Ubuntu | precise | * |
| Libssh | Ubuntu | quantal | * |
| Libssh | Ubuntu | upstream | * |