{"id":"CVE-2021-43666","details":"A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.","modified":"2026-04-10T04:40:17.840407Z","published":"2022-03-24T18:15:08.333Z","references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html"},{"type":"REPORT","url":"https://github.com/ARMmbed/mbedtls/issues/5136"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/armmbed/mbedtls","events":[{"introduced":"0"},{"last_affected":"8df2f8e7b9c7bb9390ac74bb7bace27edca81a2b"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"3.0.0"}]}}],"versions":["beta-oob-2","mbedos-release-15-11","mbedos-techcon-oob2","mbedtls-2.0.0","mbedtls-2.1.0","mbedtls-2.1.1","mbedtls-2.1.2","mbedtls-2.10.0","mbedtls-2.11.0","mbedtls-2.12.0","mbedtls-2.13.0","mbedtls-2.13.1","mbedtls-2.14.0","mbedtls-2.16.0","mbedtls-2.19.0","mbedtls-2.19.0d1","mbedtls-2.19.0d2","mbedtls-2.19.1","mbedtls-2.2.0","mbedtls-2.2.1","mbedtls-2.20.0","mbedtls-2.20.0d0","mbedtls-2.21.0","mbedtls-2.22.0d0","mbedtls-2.24.0","mbedtls-2.26.0","mbedtls-2.3.0","mbedtls-2.4.0","mbedtls-2.5.0","mbedtls-2.5.1","mbedtls-2.6.0","mbedtls-2.6.0-rc1","mbedtls-2.7.0","mbedtls-2.7.0-rc1","mbedtls-2.8.0","mbedtls-2.8.0-rc1","mbedtls-2.9.0","mbedtls-3.0.0","polarssl-1.2.0","polarssl-1.2.1","polarssl-1.2.2","polarssl-1.2.4","polarssl-1.2.5","polarssl-1.2.6","polarssl-1.3.0","polarssl-1.3.0-rc0","polarssl-1.3.1","polarssl-1.3.2","polarssl-1.3.3","polarssl-1.3.4","polarssl-1.3.5","polarssl-1.3.6","polarssl-1.3.7","polarssl-1.3.8","polarssl-1.3.9","v2.24.0","v2.26.0","v3.0.0","yotta-2.3.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43666.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"10.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}