CVE-2020-36478
Gentoo Linux Security Advisory 202301-08
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se ha detectado un problema en Mbed TLS versiones anteriores a 2.25.0 (y versiones anteriores a 2.16.9 LTS y versiones anteriores a 2.7.18 LTS). Una entrada de parámetros de algoritmo NULL parece idéntica a una matriz de REAL (tamaño cero) y, por tanto, el certificado es considerado válido. Sin embargo, si los parámetros no coinciden de ninguna manera, el certificado debe considerarse no válido.
Multiple vulnerabilities have been discovered in Mbed TLS, the worst of which could result in arbitrary code execution. Versions less than 2.28.1 are affected.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-08-23 CVE Reserved
- 2021-08-23 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-04 First Exploit
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-295: Improper Certificate Validation
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 | Release Notes | |
| https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 | Release Notes | |
| https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 | Release Notes | |
| https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html | Mailing List |
|
| URL | Date | SRC |
|---|---|---|
| https://github.com/ARMmbed/mbedtls/issues/3629 | 2024-08-04 |
| URL | Date | SRC |
|---|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf | 2023-01-11 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Siemens Search vendor "Siemens" | Logo\! Cmr2020 Firmware Search vendor "Siemens" for product "Logo\! Cmr2020 Firmware" | < 2.2 Search vendor "Siemens" for product "Logo\! Cmr2020 Firmware" and version " < 2.2" | - |
Affected
| in | Siemens Search vendor "Siemens" | Logo\! Cmr2020 Search vendor "Siemens" for product "Logo\! Cmr2020" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Logo\! Cmr2040 Firmware Search vendor "Siemens" for product "Logo\! Cmr2040 Firmware" | < 2.2 Search vendor "Siemens" for product "Logo\! Cmr2040 Firmware" and version " < 2.2" | - |
Affected
| in | Siemens Search vendor "Siemens" | Logo\! Cmr2040 Search vendor "Siemens" for product "Logo\! Cmr2040" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Simatic Rtu3031c Firmware Search vendor "Siemens" for product "Simatic Rtu3031c Firmware" | * | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Rtu3031c Search vendor "Siemens" for product "Simatic Rtu3031c" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Simatic Rtu3041c Firmware Search vendor "Siemens" for product "Simatic Rtu3041c Firmware" | * | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Rtu3041c Search vendor "Siemens" for product "Simatic Rtu3041c" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Simatic Rtu3030c Firmware Search vendor "Siemens" for product "Simatic Rtu3030c Firmware" | * | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Rtu3030c Search vendor "Siemens" for product "Simatic Rtu3030c" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Simatic Rtu3000c Firmware Search vendor "Siemens" for product "Simatic Rtu3000c Firmware" | * | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Rtu3000c Search vendor "Siemens" for product "Simatic Rtu3000c" | - | - |
Safe
|
| Arm Search vendor "Arm" | Mbed Tls Search vendor "Arm" for product "Mbed Tls" | < 2.7.18 Search vendor "Arm" for product "Mbed Tls" and version " < 2.7.18" | - |
Affected
| ||||||
| Arm Search vendor "Arm" | Mbed Tls Search vendor "Arm" for product "Mbed Tls" | >= 2.8.0 < 2.16.9 Search vendor "Arm" for product "Mbed Tls" and version " >= 2.8.0 < 2.16.9" | - |
Affected
| ||||||
| Arm Search vendor "Arm" | Mbed Tls Search vendor "Arm" for product "Mbed Tls" | >= 2.17.0 < 2.25.0 Search vendor "Arm" for product "Mbed Tls" and version " >= 2.17.0 < 2.25.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||