{"id":"UBUNTU-CVE-2018-7749","details":"The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step.","modified":"2026-01-30T01:37:29.296586Z","published":"2018-03-12T19:29:00Z","related":["USN-4854-1"],"upstream":["CVE-2018-7749"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-7749"},{"type":"REPORT","url":"https://github.com/ronf/asyncssh/commit/16e6ebfa893167c7d9d3f6dc7a2c0d197e47f43a"},{"type":"REPORT","url":"https://github.com/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4854-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-7749"}],"affected":[{"package":{"name":"python-asyncssh","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-asyncssh@1.3.0-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.0-1","1.2.1-1","1.3.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-asyncssh","binary_version":"1.3.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-7749.json"}},{"package":{"name":"python-asyncssh","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/python-asyncssh@1.11.1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.1-1ubuntu0.1~esm1"}]}],"versions":["1.8.1-2","1.11.0-2","1.11.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-asyncssh","binary_version":"1.11.1-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-7749.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:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]}