{"id":"CVE-2020-10932","aliases":["ALPINE-CVE-2020-10932","DEBIAN-CVE-2020-10932","DLA-3249-1","EUVD-2020-3338","GHSA-fj9x-f2wx-v38w","JLSEC-2025-201","MGASA-2020-0265","UBUNTU-CVE-2020-10932","openSUSE-SU-2021:0384-1","openSUSE-SU-2021:0397-1"],"status":"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...","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.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00247,"percentile":0.16186,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203","CWE-327"],"published":"2020-04-15T00:00:00Z","modified":"2026-11-03T06:32:35Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"mbedtls","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"mbedtls2","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"mbedtls2","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"mbedtls2","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"mbedtls2","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"mbedtls2","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"mbedtls3","fixed_in":["2.16.6-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"mbedtls","fixed_in":["2.16.9-0.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mbedtls","fixed_in":["2.16.9-0.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mbedtls","fixed_in":["2.16.9-0.1"],"sources":["osv"]},{"ecosystem":"Julia","package":"MbedTLS_jll","fixed_in":["2.16.6+0"],"sources":["osv"]},{"ecosystem":"Mageia:7","package":"mbedtls","fixed_in":["2.16.6-1.mga7"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 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Notes","advisory","web","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/","tags":["vendor-advisory","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/","tags":["vendor-advisory","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10932"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L"},{"url":"https://github.com/advisories/GHSA-fj9x-f2wx-v38w"},{"url":"https://security.alpinelinux.org/vuln/CVE-2020-10932","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-10932","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2020-0265.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=26758","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-10932","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-10932","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/JXL26ADEMUDQB634BGFJBSDD6LVNPAKC/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1181468","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10932","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/24S6SRIXKQUW53S4LWIAJUR5ZBOCJPEA/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2020-10932","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.","status":"published","published":"2020-04-15T00:00:00Z","modified":"2024-08-04T11:21:12.97Z","updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-3338","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.","status":"published","published":"2020-04-15T00:00:00Z","modified":"2024-08-04T11:21:12Z","updated_at":"2026-11-03T03:07:48.471313Z"}],"ghsa":[{"id":"GHSA-fj9x-f2wx-v38w","title":"An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that...","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.","status":"published","published":"2022-05-24T17:14:39Z","modified":"2026-06-05T21:32:50Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203","CWE-327"],"updated_at":"2026-11-02T15:08:36.196175Z"}],"nvd":[{"id":"CVE-2020-10932","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.","status":"published","published":"2020-04-15T14:15:20.123Z","modified":"2026-06-17T02:48:42.273Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":1.9,"vector":"AV:L/AC:M/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-203","CWE-327"],"updated_at":"2026-11-02T14:05:57.678762Z"}],"osv":[{"id":"ALPINE-CVE-2020-10932","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.","status":"published","published":"2020-04-15T14:15:20.123Z","modified":"2026-11-03T06:32:35.869773232Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:20.312441Z"},{"id":"CVE-2020-10932","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.","status":"published","published":"2020-04-15T14:15:20.123Z","modified":"2026-10-24T10:30:17.280894983Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:13.492058Z"},{"id":"DEBIAN-CVE-2020-10932","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.","status":"published","published":"2020-04-15T14:15:20.123Z","modified":"2026-10-26T12:01:17.07701296Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"JLSEC-2025-201","title":"An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15","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.","status":"published","published":"2025-11-21T15:59:04.054Z","modified":"2026-07-18T00:00:57.857621834Z","cvss":[{"version":"2.0","score":1.9,"vector":"AV:L/AC:M/Au:N/C:P/I:N/A:N","level":"low"},{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:47:17.805107Z"},{"id":"UBUNTU-CVE-2020-10932","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.","status":"published","published":"2020-04-15T14:15:00Z","modified":"2026-04-22T12:25:55.128098Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:22.212782Z"},{"id":"DLA-3249-1","title":"mbedtls - security update","status":"published","published":"2022-12-26T00:00:00Z","modified":"2026-03-09T01:22:32.743764Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"MGASA-2020-0265","title":"Updated mbedtls packages fix security vulnerability","description":"Updated mbedtls packages fix security vulnerability\n\nFix side channel in ECC code that allowed an adversary with access to precise\nenough timing and memory access information (typically an untrusted operating\nsystem attacking a secure enclave) to fully recover an ECDSA private key.\n(CVE-2020-10932)\n\nFix a potentially remotely exploitable buffer overread in a DTLS client when\nparsing the Hello Verify Request message.\n","status":"published","published":"2020-06-16T07:45:15Z","modified":"2026-04-16T04:44:37.753680748Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2021:0384-1","title":"Security update for mbedtls","description":"This update for mbedtls fixes the following issues:\n\n- mbedtls was updated to version 2.16.9\n  - CVE-2020-10932: Fixed side channel in ECC code that allowed an adversary with \n    access to precise enough timing and memory access information (typically an\n    untrusted operating system attacking a secure enclave) to fully recover\n    an ECDSA private key (boo#1181468).\n","status":"published","published":"2021-03-05T17:05:02Z","modified":"2026-02-04T02:42:04.032177Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2021:0397-1","title":"Security update for mbedtls","description":"This update for mbedtls fixes the following issues:\n\n- mbedtls was updated to version 2.16.9\n  - CVE-2020-10932: Fixed side channel in ECC code that allowed an adversary with \n    access to precise enough timing and memory access information (typically an\n    untrusted operating system attacking a secure enclave) to fully recover\n    an ECDSA private key (boo#1181468).\n\nThis update was imported from the openSUSE:Leap:15.2:Update update project.","status":"published","published":"2021-03-09T05:04:58Z","modified":"2026-02-04T03:26:40.553081Z","updated_at":"2026-11-02T16:58:31.879684Z"}]}}