CVE-2020-24511

Publication date 8 June 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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

From the Ubuntu Security Team

Joseph Nuzman discovered that some Intel processors may not properly apply EIBRS mitigations (originally developed for CVE-2017-5715) and hence may allow unauthorized memory reads via sidechannel attacks. A local attacker could use this to expose sensitive information, including kernel memory.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
intel-microcode	22.04 LTS jammy	Fixed 3.20210608.0ubuntu1
	21.10 impish	Fixed 3.20210608.0ubuntu1
	21.04 hirsute	Fixed 3.20210608.0ubuntu0.21.04.1
	20.10 groovy	Fixed 3.20210608.0ubuntu0.20.10.1
	20.04 LTS focal	Fixed 3.20210608.0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 3.20210608.0ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 3.20210608.0ubuntu0.16.04.1+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 3.20210608.0ubuntu0.14.04.1+esm1 Ubuntu Pro

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Notes

sbeattie

INTEL-TA-00464 no kernel component to this MCU update

Severity score breakdown

Parameter	Value
Base score	5.6 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-4985-1
Intel Microcode vulnerabilities
9 June 2021