CVE-2021-36647
First published: Tue Jan 17 2023(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ARM mbed TLS | <2.16.11 | |
| ARM mbed TLS | >=2.17.0<2.27.0 | |
| ARM mbed TLS | >=2.28.0<3.0.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the vulnerability ID for this security issue?
The vulnerability ID for this security issue is CVE-2021-36647.
What is the severity of CVE-2021-36647?
The severity of CVE-2021-36647 is medium with a CVSS score of 4.7.
What software versions are affected by CVE-2021-36647?
CVE-2021-36647 affects all versions of ARM mbed TLS before 3.0.0, 2.27.0, or 2.16.11.
What is the CWE ID for CVE-2021-36647?
The CWE ID for CVE-2021-36647 is 327.
How can an attacker exploit CVE-2021-36647?
Attackers with access to precise enough timing and memory access information can exploit CVE-2021-36647.
- collector/nvd-index
- agent/severity
- agent/references
- agent/author
- agent/weakness
- agent/type
- agent/event
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/arm
- canonical/arm mbed tls
- version/arm mbed tls/2.17.0
- version/arm mbed tls/2.28.0