{"id":"UBUNTU-CVE-2019-20373","details":"LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script.","modified":"2026-02-04T04:31:51.608915Z","published":"2020-01-09T23:15:00Z","related":["USN-4533-1"],"upstream":["CVE-2019-20373"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20373"},{"type":"REPORT","url":"https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba"},{"type":"REPORT","url":"https://bugs.launchpad.net/ubuntu/+source/ldm/+bug/1839431"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4533-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20373"}],"affected":[{"package":{"name":"ldm","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ldm@2:2.2.18-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:2.2.17-1","2:2.2.18-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ldm","binary_version":"2:2.2.18-1"},{"binary_name":"ldm-server","binary_version":"2:2.2.18-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20373.json"}},{"package":{"name":"ldm","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ldm@2:2.2.19-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:2.2.18-2","2:2.2.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ldm","binary_version":"2:2.2.19-1"},{"binary_name":"ldm-server","binary_version":"2:2.2.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20373.json"}},{"package":{"name":"ldm","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ldm@2:2.18.06-1+deb10u1build0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:2.18.06-1+deb10u1build0.20.04.1"}]}],"versions":["2:2.18.06-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:2.18.06-1+deb10u1build0.20.04.1","binary_name":"ldm"},{"binary_name":"ldm-server","binary_version":"2:2.18.06-1+deb10u1build0.20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20373.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}