{"id":"CVE-2020-27209","details":"The ECDSA operation of the micro-ecc library 1.0 is vulnerable to simple power analysis attacks which allows an adversary to extract the private ECC key.","modified":"2026-07-08T20:30:04.885859Z","published":"2021-05-20T21:15:07.653Z","references":[{"type":"ADVISORY","url":"https://eprint.iacr.org/2021/640"},{"type":"ADVISORY","url":"https://github.com/kmackay/micro-ecc/releases"},{"type":"ADVISORY","url":"https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html"},{"type":"ADVISORY","url":"https://www.aisec.fraunhofer.de/en/FirmwareProtection.html"},{"type":"FIX","url":"https://github.com/kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kmackay/micro-ecc","events":[{"introduced":"d037ec89546fad14b5c4d5456c2e23a71e554966"},{"last_affected":"d037ec89546fad14b5c4d5456c2e23a71e554966"},{"fixed":"1b5f5cea5145c96dd8791b9b2c41424fc74c2172"}],"database_specific":{"cpe":"cpe:2.3:a:micro-ecc_project:micro-ecc:1.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.0"},{"last_affected":"1.0"}],"source":["CPE_STRING","REFERENCES"]}}],"versions":["1.0","v1.0"],"database_specific":{"vanir_signatures_modified":"2026-07-08T20:30:04Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172","target":{"file":"uECC.c","function":"uECC_sign_with_k"},"deprecated":false,"digest":{"function_hash":"222699852159252611929325926074463076687","length":1845},"id":"CVE-2020-27209-60598547","signature_type":"Function"},{"target":{"file":"uECC.c","function":"bits2int"},"deprecated":false,"digest":{"function_hash":"249593009610380198680253538341254672925","length":834},"id":"CVE-2020-27209-b31f0120","signature_type":"Function","signature_version":"v1","source":"https://github.com/kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172"},{"source":"https://github.com/kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172","target":{"file":"uECC.c"},"deprecated":false,"digest":{"line_hashes":["305101433005125945202075426985025328958","82981267676307096887488090504005731521","334523047272041585545844686517141925718","13219967681721080572505711468151280759","139736703219472062835090805194574720541","322175786906837796354861910254680147535","139494997547063837982264738431661462491","140569503132040539094917951320904837683","124845876707839708836963364657185906542","186514073613650829788803628122917566552","91082451782934131651994864009462108059","71228014830550427819084389676258659648","305779910505877227543853235173718315715","83863216990940013339395728169779516447","259427288176910632657282464550222952273","114011282683818521246207162944723263280","285203304151542375514860935568997894598","244159355370071661642199647957797156413","247101306798905568468182249754245636472","62358630235011342321298773529477473345"],"threshold":0.9},"id":"CVE-2020-27209-d20a3de7","signature_type":"Line","signature_version":"v1"},{"signature_type":"Function","signature_version":"v1","source":"https://github.com/kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172","target":{"file":"uECC.c","function":"uECC_verify"},"deprecated":false,"digest":{"function_hash":"262377679775173692717740381933240475678","length":3062},"id":"CVE-2020-27209-da7f5c5c"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27209.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}