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.
References
Link | Resource |
---|---|
https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf | Patch Third Party Advisory |
https://github.com/ARMmbed/mbedtls/issues/3629 | Exploit Third Party Advisory |
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 | Release Notes Third Party Advisory |
https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 | Release Notes Third Party Advisory |
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 | Release Notes Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html | Mailing List Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html | Mailing List Third Party Advisory |
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History
No history.
Information
Published : 2021-08-23 02:15
Updated : 2023-01-11 17:01
NVD link : CVE-2020-36478
Mitre link : CVE-2020-36478
CVE.ORG link : CVE-2020-36478
JSON object : View
Products Affected
siemens
- simatic_rtu3041c
- logo\!_cmr2040
- simatic_rtu3031c
- simatic_rtu3030c
- simatic_rtu3041c_firmware
- simatic_rtu3000c_firmware
- simatic_rtu3030c_firmware
- logo\!_cmr2020
- logo\!_cmr2040_firmware
- logo\!_cmr2020_firmware
- simatic_rtu3000c
- simatic_rtu3031c_firmware
arm
- mbed_tls
debian
- debian_linux
CWE
CWE-295
Improper Certificate Validation