CVE-2020-36475
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*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). 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.
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). Los cálculos llevado a cabo por la función mbedtls_mpi_exp_mod no están limitados; por lo tanto, el suministro de parámetros demasiado grandes podría conllevar a una denegación de servicio cuando se generan pares de claves Diffie-Hellman.
*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
- 2024-09-25 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-131: Incorrect Calculation of Buffer Size
CAPEC
References (6)
| 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 |
|---|
| 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
| ||||||