CVE-2020-36476

moderate-risk
Published 2021-08-23

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.

Do I need to act?

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0.68% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Debian Arm

References (10)

Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
Mailing List https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
Mailing List https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
Mailing List https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
Mailing List https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
37
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 2/34 · Minimal
Exposure 9/34 · Low