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CVE-2020-24511

Published: 8 June 2021

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.

Notes

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

Priority

Medium

Cvss 3 Severity Score

5.6

Score breakdown

Status

Package Release Status
intel-microcode
Launchpad, Ubuntu, Debian
bionic
Released (3.20210608.0ubuntu0.18.04.1)
focal
Released (3.20210608.0ubuntu0.20.04.1)
groovy
Released (3.20210608.0ubuntu0.20.10.1)
hirsute
Released (3.20210608.0ubuntu0.21.04.1)
impish
Released (3.20210608.0ubuntu1)
jammy
Released (3.20210608.0ubuntu1)
precise Does not exist

trusty
Released (3.20210608.0ubuntu0.14.04.1+esm1)
upstream Needs triage

xenial
Released (3.20210608.0ubuntu0.16.04.1+esm1)

Severity score breakdown

Parameter Value
Base score 5.6
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