CVE-2020-36475

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Third-Party Advisory siemens.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory debian.org Third-Party Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 third party advisory release notes
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 third party advisory release notes
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 third party advisory release notes
https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf third party advisory patch
https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-36475?
CVE-2020-36475 has been scored as a high severity vulnerability.
How to fix CVE-2020-36475?
To fix CVE-2020-36475, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-36475 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-36475 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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