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CVE-2019-18222

Published: 23 January 2020

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.

Priority

Medium

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package Release Status
mbedtls
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(end of life)
focal Not vulnerable
(2.16.4-1ubuntu2)
groovy Not vulnerable
(2.16.4-1ubuntu2)
hirsute Not vulnerable
(2.16.4-1ubuntu2)
impish Not vulnerable
(2.16.4-1ubuntu2)
jammy Not vulnerable
(2.16.4-1ubuntu2)
kinetic Not vulnerable
(2.16.4-1ubuntu2)
lunar Not vulnerable
(2.16.4-1ubuntu2)
mantic Not vulnerable
(2.16.4-1ubuntu2)
trusty Does not exist

upstream
Released (2.16.4-1)
xenial Needs triage

Severity score breakdown

Parameter Value
Base score 4.7
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N