CVE-2020-36421

MEDIUM

Arm Mbed TLS < 2.23.0 - RSA Private Key Disclosure via Modular Exponentiation Side Channel

Title source: llm
STIX 2.1

Description

An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.

References (5)

Core 5
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Issue Tracking, Patch, Third Party Advisory
https://bugs.gentoo.org/730752
Exploit, Issue Tracking, Third Party Advisory
https://github.com/ARMmbed/mbedtls/issues/3394
Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7
Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0

Scores

CVSS v3 5.3
EPSS 0.0052
EPSS Percentile 66.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-203
Status published
Products (2)
arm/mbed_tls < 2.16.7
debian/debian_linux 10.0
Published Jul 19, 2021
Tracked Since Feb 18, 2026