CVE-2020-10932
Summary
| CVE | CVE-2020-10932 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-04-15 14:15:20 UTC |
| Updated | 2026-06-05 19:38:32 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 4.7 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.000440000 probability, percentile 0.139240000 (date 2026-06-11)
Problem Types: CWE-203 | CWE-327 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.7 | MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 2.0 | [email protected] | Primary | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0 Breakdown
Access Vector
LocalAccess Complexity
MediumAuthentication
NoneConfidentiality
PartialIntegrity
NoneAvailability
NoneAV:L/AC:M/Au:N/C:P/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Arm | Mbed Tls | All | All | All | All |
| Operating System | Debian | Debian Linux | 10.0 | All | All | All |
| Operating System | Fedoraproject | Fedora | 31 | All | All | All |
| Operating System | Fedoraproject | Fedora | 32 | All | All | All |
| Application | Trustedfirmware | Mbed Tls | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| [SECURITY] [DLA 3249-1] mbedtls security update | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Mailing List, Third Party Advisory |
| [SECURITY] Fedora 31 Update: mbedtls-2.16.6-1.fc31 - package-announce - Fedora Mailing-Lists | af854a3a-2127-422b-91ae-364da2661108 | lists.fedoraproject.org | Mailing List, Third Party Advisory |
| Side channel attack on ECDSA - Tech Updates - Mbed TLS (Previously PolarSSL) | af854a3a-2127-422b-91ae-364da2661108 | tls.mbed.org | Vendor Advisory |
| Security Advisories - Tech Updates - mbed TLS (Previously PolarSSL) | af854a3a-2127-422b-91ae-364da2661108 | tls.mbed.org | Vendor Advisory |
| [SECURITY] Fedora 32 Update: mbedtls-2.16.6-1.fc32 - package-announce - Fedora Mailing-Lists | af854a3a-2127-422b-91ae-364da2661108 | lists.fedoraproject.org | Mailing List, Third Party Advisory |
| Mbed TLS 2.16.6 and 2.7.15 released - Tech Updates - Mbed TLS (Previously PolarSSL) | af854a3a-2127-422b-91ae-364da2661108 | tls.mbed.org | Release Notes |
| [SECURITY] Fedora 31 Update: mbedtls-2.16.6-1.fc31 - package-announce - Fedora Mailing-Lists | MITRE | lists.fedoraproject.org | |
| [SECURITY] Fedora 32 Update: mbedtls-2.16.6-1.fc32 - package-announce - Fedora Mailing-Lists | MITRE | lists.fedoraproject.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.