Improper Certificate Validation Affecting mbedtls package, versions <2.16.9-0.1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.23% (62nd percentile)

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  • Snyk IDSNYK-DEBIAN12-MBEDTLS-1569099
  • published24 Aug 2021
  • disclosed23 Aug 2021

Introduced: 23 Aug 2021

CVE-2020-36478  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Debian:12 mbedtls to version 2.16.9-0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.

CVSS Scores

version 3.1