{"id":"CVE-2020-23921","details":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","modified":"2026-04-11T20:42:49.296635Z","published":"2021-04-21T18:15:08.307Z","references":[{"type":"ARTICLE","url":"https://cwe.mitre.org/data/definitions/126.html"},{"type":"EVIDENCE","url":"https://github.com/Samuel-Tyler/fast_ber/issues/30"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/samuel-tyler/fast_ber","events":[{"introduced":"0"},{"last_affected":"3aad811738443cc4e407e381a8ac700d6934e7b1"}],"database_specific":{"cpe":"cpe:2.3:a:fast_ber_project:fast_ber:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.4"}],"source":"CPE_FIELD"}}],"versions":["0.3","v0.2","v0.3","v0.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-23921.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:H/I:N/A:H"}]}