The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free an invalid pointer on an error path, which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libssh | Libssh | * | 0.5.2 (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 | Ubuntu | hardy | * |
| Libssh | Ubuntu | lucid | * |
| Libssh | Ubuntu | oneiric | * |
| Libssh | Ubuntu | precise | * |
| Libssh | Ubuntu | quantal | * |
| Libssh | Ubuntu | upstream | * |