{"id":"CVE-2021-23180","details":"A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.","modified":"2026-02-24T11:35:51.588779Z","published":"2022-03-02T23:15:08.283Z","related":["MGASA-2021-0332"],"references":[{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967041"},{"type":"ADVISORY","url":"https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a"},{"type":"ADVISORY","url":"https://github.com/michaelrsweet/htmldoc/issues/418"},{"type":"ADVISORY","url":"https://ubuntu.com/security/CVE-2021-23180"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967041"},{"type":"REPORT","url":"https://github.com/michaelrsweet/htmldoc/issues/418"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1967041"},{"type":"FIX","url":"https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a"},{"type":"EVIDENCE","url":"https://github.com/michaelrsweet/htmldoc/issues/418"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/michaelrsweet/htmldoc","events":[{"introduced":"0"},{"last_affected":"df5d3010151a506c5ca138548aac02b37fb421f9"}]}],"versions":["v1.8.30","v1.9","v1.9.1","v1.9.10","v1.9.11","v1.9.12","v1.9.2","v1.9.3","v1.9.4","v1.9.5","v1.9.6","v1.9.7","v1.9.8","v1.9.9"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-23180.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:H/I:H/A:H"}]}