{"id":"UBUNTU-CVE-2019-20053","details":"An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.","modified":"2025-10-24T04:48:07Z","published":"2019-12-27T22:15:00Z","upstream":["CVE-2019-20053"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20053"},{"type":"REPORT","url":"https://github.com/upx/upx/issues/314"},{"type":"REPORT","url":"https://github.com/upx/upx/commit/819c33fee2b2c33b96bef27a13cb20f2589819aa"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20053"}],"affected":[{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/upx-ucl@3.91-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.91-1"],"ecosystem_specific":{"binaries":[{"binary_name":"upx-ucl","binary_version":"3.91-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20053.json"}},{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/upx-ucl@3.94-4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.94-2","3.94-3","3.94-4"],"ecosystem_specific":{"binaries":[{"binary_name":"upx-ucl","binary_version":"3.94-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20053.json"}},{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/upx-ucl@3.95-2build1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.95-2","3.95-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"upx-ucl","binary_version":"3.95-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20053.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}