Mbed TLS Vulnerability in SSL Read Function by ARM
CVE-2020-36476

7.5HIGH

Key Information:

Vendor

Arm
Status
Mbed Tls
Vendor
CVE Published:
23 August 2021

What is CVE-2020-36476?

An issue in Mbed TLS prior to version 2.24.0, as well as pre-release 2.16.8 LTS and 2.7.17 LTS, exposes an application data security risk. The vulnerability arises from insufficient zeroization of plaintext buffers in the mbedtls_ssl_read function, leading to potential information leakage of sensitive data remnants from memory. This flaw emphasizes the importance of proper memory management to ensure data confidentiality.

References

https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.