CVE-2020-36478
At a glance
- Source
- NVD
- EPSS
- EPSS 1.10 % · percentile 66 ()
- 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). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.
Weaknesses (CWE)
- CWE-295 — Improper Certificate Validation
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://github.com/ARMmbed/mbedtls/issues/3629
- 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:H/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-23964
- GCVE · GCVE-0-2020-36478
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 |