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CVE-2020-36476

Good to know:

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Date: August 22, 2021

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.

Language: C

Severity Score

Related Resources (8)

https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
https://security-tracker.debian.org/tracker/CVE-2020-36476
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
https://nvd.nist.gov/vuln/detail/CVE-2020-36476
https://www.mend.io/vulnerability-database/CVE-2020-36476

Severity Score

Weakness Type (CWE)

Exposure of Resource to Wrong Sphere

CWE-668

Improper Removal of Sensitive Information Before Storage or Transfer

CWE-212

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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