{"id":"UBUNTU-CVE-2017-5645","details":"In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.","modified":"2025-09-08T16:44:07Z","published":"2017-04-17T21:59:00Z","upstream":["CVE-2017-5645"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-5645"},{"type":"REPORT","url":"https://issues.apache.org/jira/browse/LOG4J2-1863"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2017/04/17/2"},{"type":"REPORT","url":"https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;h=5dcc192"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-5645"}],"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/2017/UBUNTU-CVE-2017-5645.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"}]}