{"id":"CVE-2018-20452","details":"The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.","modified":"2026-07-08T12:28:44.071320Z","published":"2018-12-25T17:29:00.360Z","references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-64"},{"type":"EVIDENCE","url":"https://github.com/evanmiller/libxls/issues/35"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libxls/libxls","events":[{"introduced":"ab544df742cf50c730d1b6e46c66e44e3e42399f"},{"last_affected":"ab544df742cf50c730d1b6e46c66e44e3e42399f"}],"database_specific":{"extracted_events":[{"introduced":"1.4.0"},{"last_affected":"1.4.0"}],"source":"CPE_STRING","cpe":"cpe:2.3:a:libxls_project:libxls:1.4.0:*:*:*:*:*:*:*"}}],"versions":["1.4.0","v1.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20452.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}