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Vulnerability details: VCID-a53y-gez2-yqgg
Vulnerability ID VCID-a53y-gez2-yqgg
Aliases CVE-2020-10932
Summary 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
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-203 Observable Discrepancy
System Score Found at
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-10932
cvssv2 1.9 https://nvd.nist.gov/vuln/detail/CVE-2020-10932
cvssv3.1 4.7 https://nvd.nist.gov/vuln/detail/CVE-2020-10932
archlinux Medium https://security.archlinux.org/AVG-1141
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-10932
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10932
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
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://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released
https://tls.mbed.org/tech-updates/security-advisories
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04
963159 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=963159
ASA-202007-5 https://security.archlinux.org/ASA-202007-5
AVG-1141 https://security.archlinux.org/AVG-1141
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
CVE-2020-10932 https://nvd.nist.gov/vuln/detail/CVE-2020-10932
No exploits are available.
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-10932
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-10932
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.05745
EPSS Score 0.00027
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:33:37.659217+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.11/main.json 37.0.0