CVE-2020-36475
At a glance
- Source
- NVD
- EPSS
- EPSS 1.92 % · percentile 80 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-131 — Incorrect Calculation of Buffer Size
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
- https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf
- https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-23961
- GCVE · GCVE-0-2020-36475
CERT-FR advisories
- CERTFR-2021-AVI-706 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*< 2.7.18cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*≥ 2.8.0 < 2.16.9cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*≥ 2.17.0 < 2.25.0cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:*< 2.2cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:*< 2.2cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3000c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |