CVE-2020-36475

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). The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs.

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://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf

Details

Source: Mitre, NVD

Published: 2021-08-23

Updated: 2023-01-11

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High