{"id":"UBUNTU-CVE-2020-9488","details":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender. Fixed in Apache Log4j 2.12.3 and 2.13.1","modified":"2025-10-24T04:48:21Z","published":"2020-04-27T16:15:00Z","upstream":["CVE-2020-9488"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-9488"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/04/25/1"},{"type":"REPORT","url":"https://issues.apache.org/jira/browse/LOG4J2-2819"},{"type":"REPORT","url":"https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=6851b5083ef9610bae320bf07e1f24d2aa08851b"},{"type":"REPORT","url":"https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=fb91a3d71e2f3dadad6fd1beb2ab857f44fe8bbb"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-9488"}],"affected":[{"package":{"name":"apache-log4j2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/apache-log4j2@2.4-2ubuntu0.1~esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2-1","2.4-1","2.4-2","2.4-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblog4j2-java","binary_version":"2.4-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-9488.json"}},{"package":{"name":"apache-log4j2","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/apache-log4j2@2.12.4-0ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.2-1","2.8.2-2","2.10.0-1","2.10.0-2","2.10.0-2ubuntu0.1","2.12.4-0ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblog4j2-java","binary_version":"2.12.4-0ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-9488.json"}},{"package":{"name":"apache-log4j2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/apache-log4j2@2.16.0-0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.16.0-0.20.04.1"}]}],"versions":["2.11.1-2","2.11.2-1","2.15.0-0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblog4j2-java","binary_version":"2.16.0-0.20.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-9488.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}