CVE-2020-36475

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/23/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

arm:mbed_tlsdebian:debian_linuxsiemens:logo\!_cmr2020siemens:logo\!_cmr2020_firmwaresiemens:logo\!_cmr2040siemens:logo\!_cmr2040_firmwaresiemens:simatic_rtu3000csiemens:simatic_rtu3000c_firmwaresiemens:simatic_rtu3030csiemens:simatic_rtu3030c_firmwaresiemens:simatic_rtu3031csiemens:simatic_rtu3031c_firmwaresiemens:simatic_rtu3041csiemens:simatic_rtu3041c_firmware

Weaknesses (CWE)

CWE-131

References

https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf(cve@mitre.org)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9(cve@mitre.org)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0(cve@mitre.org)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html(cve@mitre.org)

https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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