CVE-2020-36421

· MEDIUMModified

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CVSS v3.1

5.3

EPSS

1.58%

Published

Jul 19, 2021

Modified

Dec 3, 2025

Public PoC / Exploit (1)

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

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.

CVSS Vector

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

Weaknesses (CWE)

CWE-203CWE-203

Affected Products (3)

arm · mbed_tls (up to 2.16.7)vulnerable

arm · mbed_tls (up to 2.23.0)vulnerable

debian · debian_linuxvulnerable

References (10)

https://bugs.gentoo.org/730752

Issue TrackingPatchThird Party Advisory

https://github.com/ARMmbed/mbedtls/issues/3394

ExploitIssue TrackingThird Party Advisory

https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7

Release NotesThird Party Advisory

https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0

Release NotesThird Party Advisory

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

Mailing ListThird Party Advisory

https://bugs.gentoo.org/730752

Issue TrackingPatchThird Party Advisory

https://github.com/ARMmbed/mbedtls/issues/3394

ExploitIssue TrackingThird Party Advisory

https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7

Release NotesThird Party Advisory

https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0

Release NotesThird Party Advisory

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

Mailing ListThird Party Advisory

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