CVE-2020-36476 Information disclosure in n/a
An attacker with memory access could read sensitive plaintext data from unused buffers in Mbed TLS due to missing zeroization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36476?
CVE-2020-36476 is a high-severity vulnerability in Arm Mbed Tls, published on 23 Aug 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 Mbed TLS before 2.24.0 (and before 2.16.8 LTS and before 2.7.17 LTS). There is missing zeroization of plaintext buffers in mbedtls_ssl_read to erase unused application data from memory.
Weakness: CWE-212
Which versions are affected by CVE-2020-36476?
It affects 2 products.
Products include Arm Mbed Tls, Debian Debian Linux.
How do I fix CVE-2020-36476?
Upgrade to a fixed version.
Is CVE-2020-36476 being exploited?
There is no known exploitation of CVE-2020-36476 in the wild and no public exploit code.
Other vulnerabilities in Arm Mbed Tls
Sources
Also known as DEBIAN-CVE-2020-36476, GHSA-gmh5-5f53-3929, JLSEC-2025-211, UBUNTU-CVE-2020-36476.