Cyber Resilience

CVE-2020-36475

High

Published: 23 August 2021

Published
23 August 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0098 77.2th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2020-36475 is a high-severity Incorrect Calculation of Buffer Size (CWE-131) vulnerability in Arm Mbed Tls. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 22.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

pairs.

CWE(s)
CWE-131

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

arm
mbed tls
≤ 2.7.18 · 2.8.0 — 2.16.9 · 2.17.0 — 2.25.0
siemens
logo\! cmr2020 firmware
≤ 2.2
siemens
logo\! cmr2040 firmware
≤ 2.2
siemens
simatic rtu3031c firmware
all versions
siemens
simatic rtu3041c firmware
all versions
siemens
simatic rtu3030c firmware
all versions
siemens
simatic rtu3000c firmware
all versions
debian
debian linux
10.0, 9.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References