Side Channel Vulnerability in Arm Mbed TLS Software
CVE-2020-36422

5.3MEDIUM

Key Information:

Vendor

Arm
Status
Mbed Tls
Vendor
CVE Published:
19 July 2021

What is CVE-2020-36422?

A vulnerability in Arm Mbed TLS prior to version 2.23.0 exposes a side channel that can be exploited to recover an ECC private key. The issue involves functions such as mbedtls_ecp_check_pub_priv, mbedtls_pk_parse_key, mbedtls_pk_parse_keyfile, mbedtls_ecp_mul, and mbedtls_ecp_mul_restartable. This could pose significant risks to applications relying on the security of ECC keys, allowing unauthorized access to sensitive data.

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References

https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7
https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0
https://bugs.gentoo.org/730752

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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