{"id":"UBUNTU-CVE-2016-6515","details":"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.","modified":"2026-02-04T03:05:09.061241Z","published":"2016-08-07T00:00:00Z","related":["USN-3061-1"],"upstream":["CVE-2016-6515"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-6515"},{"type":"REPORT","url":"http://openwall.com/lists/oss-security/2016/08/01/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3061-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-6515"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:6.6p1-2ubuntu2.8?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.6p1-2ubuntu2.8"}]}],"versions":["1:6.2p2-6","1:6.2p2-6ubuntu1","1:6.4p1-1","1:6.4p1-2","1:6.5p1-1","1:6.5p1-2","1:6.5p1-3","1:6.5p1-4","1:6.5p1-6","1:6.6p1-1","1:6.6p1-2","1:6.6p1-2ubuntu1","1:6.6p1-2ubuntu2","1:6.6p1-2ubuntu2.2","1:6.6p1-2ubuntu2.3","1:6.6p1-2ubuntu2.4","1:6.6p1-2ubuntu2.6","1:6.6p1-2ubuntu2.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"openssh-client"},{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"openssh-server"},{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"openssh-sftp-server"},{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"ssh"},{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"ssh-askpass-gnome"},{"binary_version":"1:6.6p1-2ubuntu2.8","binary_name":"ssh-krb5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-6515.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:7.2p2-4ubuntu2.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2p2-4ubuntu2.1"}]}],"versions":["1:6.9p1-2","1:6.9p1-3","1:7.1p1-1","1:7.1p1-3","1:7.1p1-4","1:7.1p1-6","1:7.1p2-1","1:7.1p2-2","1:7.2p1-1","1:7.2p2-1","1:7.2p2-2","1:7.2p2-3","1:7.2p2-4","1:7.2p2-4ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"openssh-client"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"openssh-client-ssh1"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"openssh-server"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"openssh-sftp-server"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"ssh"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"ssh-askpass-gnome"},{"binary_version":"1:7.2p2-4ubuntu2.1","binary_name":"ssh-krb5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-6515.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}