CVE-2021-36647
Medium
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.
SeverityMedium
CVSS4.7
Exploit probability—
Product
Arm Mbed Tls
PublishedJan 17, 2023
First seenJan 17, 2023
Weakness typeCWE-327CWE-327
How to fix
Update
- arm mbed_tls2.16.11, 2.27.0 or later
- trustedfirmware mbed_tls3.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| arm mbed_tls | v < 2.16.11, 2.17.0 ≤ v < 2.27.0 | 2.16.11, 2.27.0 |
| trustedfirmware mbed_tls | 2.28.0 ≤ v < 3.0.0 | 3.0.0 |
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