{"id":"UBUNTU-CVE-2021-42550","details":"In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.","modified":"2026-02-04T02:30:09.658424Z","published":"2021-12-16T19:15:00Z","related":["USN-7616-1"],"upstream":["CVE-2021-42550"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-42550"},{"type":"REPORT","url":"https://jira.qos.ch/browse/LOGBACK-1591"},{"type":"REPORT","url":"https://github.com/qos-ch/logback/commit/21d772f2bc2ed780b01b4fe108df7e29707763f1"},{"type":"REPORT","url":"https://github.com/cn-panda/logbackRceDemo"},{"type":"REPORT","url":"http://logback.qos.ch/news.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-42550"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7616-1"}],"affected":[{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/logback@1:1.1.3-2ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.1.3-2ubuntu0.1~esm1"}]}],"versions":["1:1.1.3-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.1.3-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42550.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/logback@1:1.2.3-2ubuntu1~18.04.1+esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.2.3-2ubuntu1~18.04.1+esm1"}]}],"versions":["1:1.1.9-4","1:1.1.9-5","1:1.2.3-2","1:1.2.3-2ubuntu1~18.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.2.3-2ubuntu1~18.04.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42550.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/logback@1:1.2.3-5ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.2.3-5ubuntu0.1~esm1"}]}],"versions":["1:1.2.3-5"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.2.3-5ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42550.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}