CVE-2020-20949
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductStm32cubef0
PublishedJan 20, 2021
First seenJan 20, 2021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| st stm32cubef0 | No range specified | — |
| st stm32cubef1 | No range specified | — |
| st stm32cubef2 | No range specified | — |
| st stm32cubef3 | No range specified | — |
| st stm32cubef4 | No range specified | — |
| st stm32cubef7 | No range specified | — |
| st stm32cubeg0 | No range specified | — |
| st stm32cubeg4 | No range specified | — |
| st stm32cubeh7 | No range specified | — |
| st stm32cubeide | No range specified | — |
| st stm32cubel0 | No range specified | — |
| st stm32cubel1 | No range specified | — |
| st stm32cubel4 | No range specified | — |
| st stm32cubel4\+ | No range specified | — |
| st stm32cubel5 | No range specified | — |
| st stm32cubemonitor | No range specified | — |
| st stm32cubemp1 | No range specified | — |
| st stm32cubemx | No range specified | — |
| st stm32cubeprogrammer | No range specified | — |
| st stm32cubewb | No range specified | — |
| st stm32cubewl | No range specified | — |
| ietf public_key_cryptography_standards_\#1 | 1.5 | — |
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