View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2016-6515 medium priority: Ubuntu including 1 source packages (openssh), 6 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): released 4, not-affected 2.
The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.