{"id":"UBUNTU-CVE-2015-6563","details":"The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.","modified":"2026-02-04T03:05:24.441353Z","published":"2015-08-24T01:59:00Z","related":["USN-2710-1"],"upstream":["CVE-2015-6563"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-6563"},{"type":"REPORT","url":"https://anongit.mindrot.org/openssh.git/commit/?id=d4697fe9a28dab7255c60433e4dd23cf7fce8a8b"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2015/08/11/9"},{"type":"REPORT","url":"https://github.com/openssh/openssh-portable/commit/d4697fe9a28dab7255c60433e4dd23cf7fce8a8b"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2015/08/22/1"},{"type":"REPORT","url":"http://www.openssh.com/txt/release-7.0"},{"type":"REPORT","url":"http://seclists.org/fulldisclosure/2015/Aug/54"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2710-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-6563"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:6.6p1-2ubuntu2.2?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.6p1-2ubuntu2.2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"openssh-client"},{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"openssh-server"},{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"openssh-sftp-server"},{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"ssh"},{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"ssh-askpass-gnome"},{"binary_version":"1:6.6p1-2ubuntu2.2","binary_name":"ssh-krb5"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-6563.json"}}],"schema_version":"1.7.3","severity":[{"type":"Ubuntu","score":"medium"}]}