CVE-2020-36478

 

Published at: - 23-08-2021 04:15

Last modified: - 11-01-2023 06:01

Total changes: - 9

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

 

Verification logic

 

Reference

• https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9
• https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0
• https://github.com/ARMmbed/mbedtls/issues/3629
• https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18
• https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf
• [debian-lts-announce] 20211123 [SECURITY] [DLA 2826-1] mbedtls security update-Mailing List, Third Party Advisory
• [debian-lts-announce] 20221225 [SECURITY] [DLA 3249-1] mbedtls security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2020-36478

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures