CVE-2020-36421

Name of the Vulnerable Software and Affected Versions Arm Mbed TLS versions prior to 2.23.0

Description The issue is related to a side channel in modular exponentiation, which could disclose an RSA private key used in a secure enclave. This is due to a dependency of the instruction timing on the instruction data, allowing a remote attacker to access confidential data.

Recommendations For versions prior to 2.23.0, update to version 2.23.0 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive data handled by the secure enclave until the update is applied.