@Mediaservice.net discovered two information leaks in the OpenSSH
server. When using password authentication, an attacker could
test whether a login name exists by measuring the time between
failed login attempts, i. e. the time after which the “password:”
prompt appears again.
A similar issue affects systems which do not allow root logins over
ssh (“PermitRootLogin no”). By measuring the time between login
attempts an attacker could check whether a given root password is
correct. This allowed determining weak root passwords using a brute
force attack.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Ubuntu | 4.10 | noarch | openssh-server | < * | UNKNOWN |