{"id":"UBUNTU-CVE-2021-38173","details":"Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.","modified":"2025-10-24T04:50:28Z","published":"2021-08-07T19:15:00Z","upstream":["CVE-2021-38173"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-38173"},{"type":"REPORT","url":"https://github.com/digint/btrbk/commit/58212de771c381cd4fa05625927080bf264e9584"},{"type":"REPORT","url":"https://github.com/digint/btrbk/blob/master/ChangeLog"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-38173"}],"affected":[{"package":{"name":"btrbk","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/btrbk@0.22.2-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.19.3-1","0.20.0-1","0.21.0-1","0.22.0-1","0.22.1-1","0.22.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.22.2-1","binary_name":"btrbk"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json"}},{"package":{"name":"btrbk","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/btrbk@0.26.0-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.25.1-1","0.26.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"btrbk","binary_version":"0.26.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.json"}},{"package":{"name":"btrbk","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/btrbk@0.27.1-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.27.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.27.1-1","binary_name":"btrbk"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38173.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:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}