intel-microcode: CVSS (Max): 6.5

May 9, 2024

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AUSCERT External Security Bulletin Redistribution

ESB-2024.2877
intel-microcode security update
9 May 2024

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AusCERT Security Bulletin Summary
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Product: intel-microcode
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2023-43490 CVE-2023-38575 CVE-2023-39368
CVE-2023-22655 CVE-2023-28746

Original Bulletin:
https://lists.debian.org/debian-lts-announce/2024/05/msg00003.html

Comment: CVSS (Max): 6.5 CVE-2023-39368 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
CVSS Source: Intel Corporation
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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Debian LTS Advisory DLA-3808-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Tobias Frost
May 04, 2024 https://wiki.debian.org/LTS
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Package : intel-microcode
Version : 3.20240312.1~deb10u1
CVE ID : CVE-2023-22655 CVE-2023-28746 CVE-2023-38575 CVE-2023-39368
CVE-2023-43490
Debian Bug : 1066108

Intel has released microcode updates, addressing serveral vulnerabilties.

CVE-2023-22655

Protection mechanism failure in some 3rd and 4th Generation Intel(R)
Xeon(R) Processors when using Intel(R) SGX or Intel(R) TDX may allow
a privileged user to potentially enable escalation of privilege via
local access.

CVE-2023-28746

Information exposure through microarchitectural state after
transient execution from some register files for some Intel(R)
Atom(R) Processors may allow an authenticated user to potentially
enable information disclosure via local access.

CVE-2023-38575

Non-transparent sharing of return predictor targets between contexts
in some Intel(R) Processors may allow an authorized user to
potentially enable information disclosure via local access.

CVE-2023-39368

Protection mechanism failure of bus lock regulator for some Intel(R)
Processors may allow an unauthenticated user to potentially enable
denial of service via network access.

CVE-2023-43490

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.

For Debian 10 buster, these problems have been fixed in version
3.20240312.1~deb10u1.

We recommend that you upgrade your intel-microcode packages.

For the detailed security status of intel-microcode please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/intel-microcode

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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