CVE-2020-36422 Information disclosure in n/a
A side-channel vulnerability in Mbed TLS allows attackers to recover ECC private keys through timing analysis during key parsing and multiplication operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36422?
CVE-2020-36422 is a medium-severity vulnerability in Arm Mbed Tls, published on 19 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Arm Mbed TLS before 2.23.0. A side channel allows recovery of an ECC private key, related to mbedtls_ecp_check_pub_priv, mbedtls_pk_parse_key, mbedtls_pk_parse_keyfile, mbedtls_ecp_mul, and mbedtls_ecp_mul_restartable.
Weakness: CWE-203
Which versions are affected by CVE-2020-36422?
It affects 2 products.
Products include Arm Mbed Tls, Debian Debian Linux.
How do I fix CVE-2020-36422?
Upgrade to a fixed version.
Is CVE-2020-36422 being exploited?
There is no known exploitation of CVE-2020-36422 in the wild and no public exploit code.
Other vulnerabilities in Arm Mbed Tls
Sources
Also known as DEBIAN-CVE-2020-36422, GHSA-wc7q-3x28-qj26, JLSEC-2025-205, UBUNTU-CVE-2020-36422.