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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-36647 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/ARMmbed/mbedtls/releases/ Third Party Advisory 
https://github.com/ARMmbed/mbedtls/releases/ Third Party Advisory 
https://kouzili.com/Load-Step.pdf Third Party Advisory 
https://kouzili.com/Load-Step.pdf Third Party Advisory 
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1 Vendor Advisory 
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1 Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-327 Use of a Broken or Risky Cryptographic Algorithm cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-36647
NVD Published Date:
01/17/2023
NVD Last Modified:
11/21/2024
Source:
MITRE