CVE-2022-21233

Publication date 9 August 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
intel-microcode	24.10 oracular	Fixed 3.20220809.0ubuntu1
	24.04 LTS noble	Fixed 3.20220809.0ubuntu1
	23.10 mantic	Fixed 3.20220809.0ubuntu1
	23.04 lunar	Fixed 3.20220809.0ubuntu1
	22.10 kinetic	Fixed 3.20220809.0ubuntu1
	22.04 LTS jammy	Fixed 3.20220809.0ubuntu0.22.04.1
	20.04 LTS focal	Fixed 3.20220809.0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 3.20220809.0ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 3.20230214.0ubuntu0.16.04.1+esm1 Ubuntu Pro
	14.04 LTS trusty	Ignored end of ESM support, was needed

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Notes

sbeattie

Intel TA-00657 only known impact is to compromise SGX

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
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

References

Related Ubuntu Security Notices (USN)

USN-5612-1
Intel Microcode vulnerability
15 September 2022