Detections
Analytics
CVE-2020-36478
high
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.
References
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18
https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9
https://github.com/ARMmbed/mbedtls/issues/3629
https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf