openssh - security update

Eddie Harari reported that the OpenSSH SSH daemon allows user
enumeration through timing differences when trying to authenticate
users. When sshd tries to authenticate a non-existing user, it will pick
up a fixed fake password structure with a hash based on the Blowfish
algorithm. If real users passwords are hashed using SHA256/SHA512, then
a remote attacker can take advantage of this flaw by sending large
passwords, receiving shorter response times from the server for
non-existing users.

For the stable distribution (jessie), this problem has been fixed in
version 1:6.7p1-5+deb8u3.

For the unstable distribution (sid), this problem has been fixed in
version 1:7.2p2-6.

We recommend that you upgrade your openssh packages.