Detections
Analytics

CVE-2019-18222

medium

Description

The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/

https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html

https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12

https://tls.mbed.org/tech-updates/security-advisories

Details

Source: Mitre, NVD

Published: 2020-01-23

Updated: 2023-03-03

Risk Information

CVSS v2

Base Score: 1.9

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N

Severity: Low

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00079