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CVE-2022-46392

MEDIUMCVSS 5.3/10EPSS 0.79%

Last modified

CVE-2022-46392 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.

Metrics

CVSS 3.1
5.3/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS Probability
0.79%

51.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ArmMbed Tls< 2.28.2
TrustedfirmwareMbed Tls>= 3.0.0, < 3.3.0
FedoraprojectFedora36
FedoraprojectFedora37

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-46392?
An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.
How severe is CVE-2022-46392?
CVE-2022-46392 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.
How do I fix CVE-2022-46392?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-46392?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST