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CVE-2020-36421

Date: July 18, 2021

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.

Language: C

Severity Score

5.3

Related Resources (9)

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

Url: https://bugs.gentoo.org/730752

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

Url: https://security-tracker.debian.org/tracker/CVE-2020-36421

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

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2020-36421

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

Url: https://nvd.nist.gov/vuln/detail/CVE-2020-36421

Url: https://www.mend.io/vulnerability-database/CVE-2020-36421

Severity Score

5.3

Weakness Type (CWE)

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:	5.3
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	LOW
Integrity (I):	NONE
Availability (A):	NONE

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	NONE
Additional information:

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