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CVE-2022-21233

Published: 9 August 2022

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

From the Ubuntu Security Team

Pietro Borrello, Andreas Kogler, Martin Schwarzl, Daniel Gruss, Michael Schwarz and Moritz Lipp discovered that some Intel processors did not properly clear data between subsequent xAPIC MMIO reads. This could allow a local attacker to compromise SGX enclaves.

Notes

AuthorNote
sbeattie
Intel TA-00657
only known impact is to compromise SGX

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
intel-microcode
Launchpad, Ubuntu, Debian
trusty Needed

upstream
Released (microcode-20220809)
xenial
Released (3.20230214.0ubuntu0.16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (3.20220809.0ubuntu0.18.04.1)
focal
Released (3.20220809.0ubuntu0.20.04.1)
jammy
Released (3.20220809.0ubuntu0.22.04.1)
kinetic
Released (3.20220809.0ubuntu1)
lunar
Released (3.20220809.0ubuntu1)
mantic
Released (3.20220809.0ubuntu1)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N