{"id":"UBUNTU-CVE-2018-15473","details":"OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.","modified":"2026-02-04T04:09:29.364288Z","published":"2018-08-17T00:00:00Z","related":["USN-3809-1"],"upstream":["CVE-2018-15473"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-15473"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2018/08/15/5"},{"type":"REPORT","url":"https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3809-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-15473"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:6.6p1-2ubuntu2.11?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.6p1-2ubuntu2.11"}]}],"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","1:6.6p1-2ubuntu2.8","1:6.6p1-2ubuntu2.10"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:6.6p1-2ubuntu2.11"},{"binary_name":"openssh-server","binary_version":"1:6.6p1-2ubuntu2.11"},{"binary_name":"openssh-sftp-server","binary_version":"1:6.6p1-2ubuntu2.11"},{"binary_name":"ssh","binary_version":"1:6.6p1-2ubuntu2.11"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:6.6p1-2ubuntu2.11"},{"binary_name":"ssh-krb5","binary_version":"1:6.6p1-2ubuntu2.11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15473.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:7.2p2-4ubuntu2.6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2p2-4ubuntu2.6"}]}],"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","1:7.2p2-4ubuntu2.1","1:7.2p2-4ubuntu2.2","1:7.2p2-4ubuntu2.4","1:7.2p2-4ubuntu2.5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"openssh-client-ssh1","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"openssh-server","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"openssh-sftp-server","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"ssh","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:7.2p2-4ubuntu2.6"},{"binary_name":"ssh-krb5","binary_version":"1:7.2p2-4ubuntu2.6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15473.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:7.6p1-4ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.6p1-4ubuntu0.1"}]}],"versions":["1:7.5p1-10","1:7.6p1-4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:7.6p1-4ubuntu0.1"},{"binary_name":"openssh-server","binary_version":"1:7.6p1-4ubuntu0.1"},{"binary_name":"openssh-sftp-server","binary_version":"1:7.6p1-4ubuntu0.1"},{"binary_name":"ssh","binary_version":"1:7.6p1-4ubuntu0.1"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:7.6p1-4ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-15473.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}