CVE-2020-20949 describes a Bleichenbacher's oracle attack vulnerability affecting the STM32 cryptographic firmware library (UM1924) used in STM32Cube. This flaw allows an unauthenticated attacker to decrypt RSA-encrypted ciphertext by repeatedly querying a server utilizing the vulnerable library, leading to remote information disclosure. Rated Medium severity (CVSS 5.9), the attack has high complexity but can result in a complete compromise of confidentiality. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32cubef0:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32cubef1:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32cubef2:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32cubef3:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:st:stm32cubef4:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.