CVE-2021-36647
Mbed TLS Exposes RSA Private Keys in SGX Secure Enclave
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.
INFO
Published Date :
Jan. 17, 2023, 9:15 p.m.
Last Modified :
Jan. 27, 2023, 5:56 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
Public PoC/Exploit Available at Github
CVE-2021-36647 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-36647.
| URL | Resource |
|---|---|
| https://github.com/ARMmbed/mbedtls/releases/ | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Prototype of the precise TrustZone execution control framework for exploring side-channel attacks.
Makefile Shell C Assembly Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-36647 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-36647 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 27, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/ARMmbed/mbedtls/releases/ No Types Assigned https://github.com/ARMmbed/mbedtls/releases/ Third Party Advisory Changed Reference Type https://kouzili.com/Load-Step.pdf No Types Assigned https://kouzili.com/Load-Step.pdf Third Party Advisory Changed Reference Type https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1 No Types Assigned https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1 Vendor Advisory Added CWE NIST CWE-327 Added CPE Configuration OR *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions up to (excluding) 2.16.11 *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions from (including) 2.17.0 up to (excluding) 2.27.0 *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions from (including) 2.28.0 up to (excluding) 3.0.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-36647 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-36647
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.23903
percentile