CVE-2023-43490

Publication date 12 March 2024

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
intel-microcode 24.04 LTS noble
Not affected
23.10 mantic
Fixed 3.20240514.0ubuntu0.23.10.1
22.04 LTS jammy
Fixed 3.20240514.0ubuntu0.22.04.1
20.04 LTS focal
Fixed 3.20240514.0ubuntu0.20.04.1
18.04 LTS bionic
Fixed 3.20240514.0ubuntu0.18.04.1+esm1
16.04 LTS xenial
Fixed 3.20240514.0ubuntu0.16.04.1+esm1
14.04 LTS trusty Ignored trusty doesn’t support early microcode loading at runtime

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Severity score breakdown

Parameter Value
Base score 5.3 · Medium
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

References

Related Ubuntu Security Notices (USN)

    • USN-6797-1
    • Intel Microcode vulnerabilities
    • 29 May 2024

Other references