The key_certify function in usr.bin/ssh/key.c in OpenSSH 5.6 and 5.7, when generating legacy certificates using the -t command-line option in ssh-keygen, does not initialize the nonce field, which might allow remote attackers to obtain sensitive stack memory contents or make it easier to conduct hash collision attacks.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssh | Openbsd | 5.6 (including) | 5.6 (including) |
| Openssh | Openbsd | 5.7 (including) | 5.7 (including) |
| Openssh | Ubuntu | upstream | * |