CVE-2020-36424

Name: CVE-2020-36424
Creator: NVD / NIST
Published: 2021-07-19T17:15:11.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2020-36424 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. An issue was discovered in Arm Mbed TLS before 2.24.0. An attacker can recover a private key (for RSA or static Diffie-Hellman) via a side-channel attack against generation of base blinding/unblinding values.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

An issue was discovered in Arm Mbed TLS before 2.24.0. An attacker can recover a private key (for RSA or static Diffie-Hellman) via a side-channel attack against generation of base blinding/unblinding values.

Metrics

CVSS 3.1

4.7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.34%

26.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Arm	Mbed Tls	< 2.7.17
Arm	Mbed Tls	>= 2.8.0, < 2.16.8
Arm	Mbed Tls	>= 2.17.0, < 2.24.0
Debian	Debian Linux	10.0

References

https://bugs.gentoo.org/740108Issue Tracking, Patch, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-2Vendor Advisory
https://bugs.gentoo.org/740108Issue Tracking, Patch, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-2Vendor Advisory

Timeline

Published: Jul 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36424?

How severe is CVE-2020-36424?

CVE-2020-36424 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36424?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36424?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST