CVE-2021-36647: Medium severity Arm mbed TLS vulnerability
Use of a Broken or Risky Cryptographic Algorithm in the function mbedtlsmpiexpmod() 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.
Other sources
Use of a Broken or Risky Cryptographic Algorithm in the function mbedtlsmpiexpmod() 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.
Affected Software
Event History
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.