{"id":"UBUNTU-CVE-2023-23456","details":"A heap-based buffer overflow issue was discovered in UPX in PackTmt::pack() in p_tmt.cpp file. The flow allows an attacker to cause a denial of service (abort) via a crafted file.","modified":"2026-05-20T16:07:35.248650672Z","published":"2023-01-12T19:15:00Z","upstream":["CVE-2023-23456"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-23456"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2160381"},{"type":"REPORT","url":"https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4"},{"type":"REPORT","url":"https://github.com/upx/upx/issues/632"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-23456"}],"affected":[{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/upx-ucl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.96-3","4.2.2-3"],"ecosystem_specific":{"binaries":[{"binary_name":"upx-ucl","binary_version":"4.2.2-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-23456.json"}},{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/upx-ucl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1","4.2.4-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"upx-ucl","binary_version":"4.2.4-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-23456.json"}},{"package":{"name":"upx-ucl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/upx-ucl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1.1","4.2.4-1.1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.4-1.1build1","binary_name":"upx-ucl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-23456.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"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"}]}