CVE-2020-36478
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Arm Mbed Tls
PublishedAug 23, 2021
First seenAug 23, 2021
How to fix
Update
- arm mbed_tls2.7.18, 2.16.9, 2.25.0 or later
- siemens logo\!_cmr2020_firmware2.2 or later
- siemens logo\!_cmr2040_firmware2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| arm mbed_tls | v < 2.7.18, 2.8.0 ≤ v < 2.16.9, 2.17.0 ≤ v < 2.25.0 | 2.7.18, 2.16.9, 2.25.0 |
| siemens logo\!_cmr2020_firmware | v < 2.2 | 2.2 |
| siemens logo\!_cmr2040_firmware | v < 2.2 | 2.2 |
| siemens simatic_rtu3031c_firmware | No range specified | — |
| siemens simatic_rtu3041c_firmware | No range specified | — |
| siemens simatic_rtu3030c_firmware | No range specified | — |
| siemens simatic_rtu3000c_firmware | No range specified | — |
| debian debian_linux | 9.0, 10.0 | — |
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