Arch Linux Security Advisory ASA-202106-34
=========================================
Severity: High
Date    : 2021-06-15
CVE-ID  : CVE-2020-24511 CVE-2020-24512 CVE-2020-24513 CVE-2021-24489
Package : intel-ucode
Type    : multiple issues
Remote  : No
Link    : https://security.archlinux.org/AVG-2051

Summary
======
The package intel-ucode before version 20210608-1 is vulnerable to
multiple issues including privilege escalation and information
disclosure.

Resolution
=========
Upgrade to 20210608-1.

# pacman -Syu "intel-ucode>=20210608-1"

The problems have been fixed upstream in version 20210608.

Workaround
=========
None.

Description
==========
- CVE-2020-24511 (information disclosure)

Improper isolation of shared resources in some Intel(R) Processors may
allow an authenticated user to potentially enable information
disclosure via local access.

- CVE-2020-24512 (information disclosure)

Observable timing discrepancy in some Intel(R) Processors may allow an
authenticated user to potentially enable information disclosure via
local access.

- CVE-2020-24513 (information disclosure)

Domain-bypass transient execution vulnerability in some Intel Atom(R)
Processors may allow an authenticated user to potentially enable
information disclosure via local access.

- CVE-2021-24489 (privilege escalation)

Incomplete cleanup in some Intel(R) VT-d products may allow an
authenticated user to potentially enable escalation of privilege via
local access.

Impact
=====
A local attacker could escalate privileges or disclose sensitive
information about the processor state using a side-channel attack.

References
=========
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00464.html
https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/tag/microcode-20210608
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00465.html
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00442.html
https://security.archlinux.org/CVE-2020-24511
https://security.archlinux.org/CVE-2020-24512
https://security.archlinux.org/CVE-2020-24513
https://security.archlinux.org/CVE-2021-24489