Vulnerability in Arm Mbed TLS
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
Affected products
- Arm Mbed TLS
- Trustedfirmware Mbed TLS
- Fedoraproject Fedora — versions 36, 37
Weakness classification (CWE)
References
- github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0 (Third Party Advisory, Release Notes)
- github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2 (Third Party Advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-46392?
- CVE-2022-46392 is a medium-severity vulnerability in Arm Mbed TLS, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2022-12-15.
- How severe is CVE-2022-46392?
- Medium severity. CVSS v3 base score is 5.3 out of 10.