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CVE-2023-43490

Published: 12 March 2024

Incorrect calculation in microcode keying mechanism for some Intel(R) Xeon(R) D Processors with Intel(R) SGX may allow a privileged user to potentially enable information disclosure via local access.

From the Ubuntu Security Team

It was discovered that some Intel® Xeon® D Processors did not properly calculate the SGX base key when using Intel® SGX. A privileged local attacker could use this to obtain sensitive information.

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
intel-microcode
Launchpad, Ubuntu, Debian
bionic
Released (3.20240514.0ubuntu0.18.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (3.20240514.0ubuntu0.20.04.1)
jammy
Released (3.20240514.0ubuntu0.22.04.1)
mantic
Released (3.20240514.0ubuntu0.23.10.1)
noble Not vulnerable
(3.20240312.1build1)
trusty Ignored
(trusty doesn't support early microcode loading at runtime)
upstream Needs triage

xenial
Released (3.20240514.0ubuntu0.16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Changed
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N