CVE-2020-20949
Severity Score
5.9
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in STM32 cryptographic firmware library software expansion for STM32Cube (UM1924). The vulnerability can allow one to use Bleichenbacher's oracle attack to decrypt an encrypted ciphertext by making successive queries to the server using the vulnerable library, resulting in remote information disclosure.
El ataque de Bleichenbacher en el relleno PKCS #1 v1.5 para RSA en la expansión del software de la biblioteca de firmware criptográfico STM32 para STM32Cube (UM1924). La vulnerabilidad puede permitir que uno use un ataque de oráculo de Bleichenbacher para descifrar un texto cifrado encriptado al hacer consultas sucesivas al servidor usando la biblioteca vulnerable, resultando en la divulgación de información remota
*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
- 2020-08-13 CVE Reserved
- 2021-01-20 CVE Published
- 2024-08-04 CVE Updated
- 2024-11-09 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf | Technical Description | |
| http://st.com | Product | |
| http://x-cube-cryptolib.com | Broken Link | |
| https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb | Technical Description | |
| https://www.st.com/en/embedded-software/x-cube-cryptolib.html | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| St Search vendor "St" | Stm32cubef0 Search vendor "St" for product "Stm32cubef0" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubef1 Search vendor "St" for product "Stm32cubef1" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubef2 Search vendor "St" for product "Stm32cubef2" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubef3 Search vendor "St" for product "Stm32cubef3" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubef4 Search vendor "St" for product "Stm32cubef4" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubef7 Search vendor "St" for product "Stm32cubef7" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubeg0 Search vendor "St" for product "Stm32cubeg0" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubeg4 Search vendor "St" for product "Stm32cubeg4" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubeh7 Search vendor "St" for product "Stm32cubeh7" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubeide Search vendor "St" for product "Stm32cubeide" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubel0 Search vendor "St" for product "Stm32cubel0" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubel1 Search vendor "St" for product "Stm32cubel1" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubel4 Search vendor "St" for product "Stm32cubel4" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubel4\+ Search vendor "St" for product "Stm32cubel4\+" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubel5 Search vendor "St" for product "Stm32cubel5" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubemonitor Search vendor "St" for product "Stm32cubemonitor" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubemp1 Search vendor "St" for product "Stm32cubemp1" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubemx Search vendor "St" for product "Stm32cubemx" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubeprogrammer Search vendor "St" for product "Stm32cubeprogrammer" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubewb Search vendor "St" for product "Stm32cubewb" | - | - |
Affected
| ||||||
| St Search vendor "St" | Stm32cubewl Search vendor "St" for product "Stm32cubewl" | - | - |
Affected
| ||||||
| Ietf Search vendor "Ietf" | Public Key Cryptography Standards \#1 Search vendor "Ietf" for product "Public Key Cryptography Standards \#1" | 1.5 Search vendor "Ietf" for product "Public Key Cryptography Standards \#1" and version "1.5" | - |
Affected
| ||||||