CVE-2021-36647

 

Published at: - 17-01-2023 10:15

Last modified: - 27-01-2023 06:56

Total changes: - 2

Description

Use of a Broken or Risky Cryptographic Algorithm in the function mbedtls_mpi_exp_mod() in lignum.c in Mbed TLS Mbed TLS all versions before 3.0.0, 2.27.0 or 2.16.11 allows attackers with access to precise enough timing and memory access information (typically an untrusted operating system attacking a secure enclave such as SGX or the TrustZone secure world) to recover the private keys used in RSA.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://kouzili.com/Load-Step.pdf
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1
• https://github.com/ARMmbed/mbedtls/releases/

 

Keywords

NVD

 

CVE-2021-36647

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures