Denial of Service Vulnerability in Mbed TLS by ARM
CVE-2020-36475

7.5HIGH

Key Information:

Vendor
Arm
Status
Mbed Tls
Vendor
CVE Published:
23 August 2021

Summary

An issue in Mbed TLS prior to version 2.25.0 can lead to Denial of Service due to unrestricted calculations performed by mbedtls_mpi_exp_mod. This could allow an attacker to supply excessively large parameters, potentially disrupting the generation of Diffie-Hellman key pairs.

References

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/releases/tag/v2.7.18

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.