{"id":"CVE-2020-10932","state":"PUBLISHED","title":"An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA pri","description":"An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS.","publishedAt":"2020-04-15T00:00:00.000Z","updatedAt":"2024-08-04T11:21:12.970Z","severity":null,"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://tls.mbed.org/tech-updates/security-advisories","https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04","https://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/","https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html"],"weaknesses":[],"ingestedAt":"2026-10-29T19:46:21.897Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/10xxx/CVE-2020-10932.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-10932","state":"PUBLISHED","datePublished":"2020-04-15T00:00:00.000Z","dateUpdated":"2024-08-04T11:21:12.970Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2020-03-24T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://tls.mbed.org/tech-updates/security-advisories"},{"url":"https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04"},{"url":"https://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/","name":"FEDORA-2020-9a6e8e63e9","tags":["vendor-advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/","name":"FEDORA-2020-42564738a1","tags":["vendor-advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html","name":"[debian-lts-announce] 20221225 [SECURITY] [DLA 3249-1] mbedtls security update","tags":["mailing-list"]}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"n/a"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2022-12-26T00:00:00.000Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://tls.mbed.org/tech-updates/security-advisories","tags":["x_transferred"]},{"url":"https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04","tags":["x_transferred"]},{"url":"https://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released","tags":["x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/","name":"FEDORA-2020-9a6e8e63e9","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/","name":"FEDORA-2020-42564738a1","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html","name":"[debian-lts-announce] 20221225 [SECURITY] [DLA 3249-1] mbedtls security update","tags":["mailing-list","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T11:21:12.970Z"}}]}}}