VAR-202106-0343

Vulnerability from variot - Updated: 2026-04-10 22:00

Improper isolation of shared resources in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. Intel Processors (Intel processors) are Intel Corporation's processors that interpret computer instructions and process data in computer software. An authenticated attacker could exploit this vulnerability to obtain sensitive information. 6 ELS) - i386, x86_64

  1. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256

====================================================================
Red Hat Security Advisory

Synopsis: Important: microcode_ctl security, bug fix and enhancement update Advisory ID: RHSA-2021:2303-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:2303 Issue date: 2021-06-08 CVE Names: CVE-2020-24489 CVE-2020-24511 CVE-2020-24512 CVE-2020-24513 ==================================================================== 1. Summary:

An update for microcode_ctl is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 7.6) - x86_64 Red Hat Enterprise Linux Server E4S (v. 7.6) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.6) - x86_64

  1. Description:

The microcode_ctl packages provide microcode updates for Intel.

Security Fix(es):

  • hw: vt-d related privilege escalation (CVE-2020-24489)

  • hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)

  • hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)

  • hw: information disclosure on some Intel Atom processors (CVE-2020-24513)

Bug Fix(es) and Enhancement(s):

  • Update Intel CPU microcode to microcode-20210525 release

  • Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

  1. Bugs fixed (https://bugzilla.redhat.com/):

1962650 - CVE-2020-24489 hw: vt-d related privilege escalation 1962666 - CVE-2020-24513 hw: information disclosure on some Intel Atom processors 1962702 - CVE-2020-24511 hw: improper isolation of shared resources in some Intel Processors 1962722 - CVE-2020-24512 hw: observable timing discrepancy in some Intel Processors

  1. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.6):

Source: microcode_ctl-2.1-47.21.el7_6.src.rpm

x86_64: microcode_ctl-2.1-47.21.el7_6.x86_64.rpm microcode_ctl-debuginfo-2.1-47.21.el7_6.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.6):

Source: microcode_ctl-2.1-47.21.el7_6.src.rpm

x86_64: microcode_ctl-2.1-47.21.el7_6.x86_64.rpm microcode_ctl-debuginfo-2.1-47.21.el7_6.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.6):

Source: microcode_ctl-2.1-47.21.el7_6.src.rpm

x86_64: microcode_ctl-2.1-47.21.el7_6.x86_64.rpm microcode_ctl-debuginfo-2.1-47.21.el7_6.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/

  1. References:

https://access.redhat.com/security/cve/CVE-2020-24489 https://access.redhat.com/security/cve/CVE-2020-24511 https://access.redhat.com/security/cve/CVE-2020-24512 https://access.redhat.com/security/cve/CVE-2020-24513 https://access.redhat.com/security/updates/classification/#important

  1. Contact:

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/

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-- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce

Show details on source website

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A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available for each vulnerability\nfrom the CVE link(s) in the References section. \n\n2. Relevant releases/architectures:\n\nRed Hat Enterprise Linux Server AUS (v. 7.6) - x86_64\nRed Hat Enterprise Linux Server E4S (v. 7.6) - x86_64\nRed Hat Enterprise Linux Server TUS (v. 7.6) - x86_64\n\n3. Description:\n\nThe microcode_ctl packages provide microcode updates for Intel. \n\nSecurity Fix(es):\n\n* hw: vt-d related privilege escalation (CVE-2020-24489)\n\n* hw: improper isolation of shared resources in some Intel Processors\n(CVE-2020-24511)\n\n* hw: observable timing discrepancy in some Intel Processors\n(CVE-2020-24512)\n\n* hw: information disclosure on some Intel Atom processors (CVE-2020-24513)\n\nBug Fix(es) and Enhancement(s):\n\n* Update Intel CPU microcode to microcode-20210525 release\n\n4. Solution:\n\nBefore applying this update, make sure all previously released errata\nrelevant to your system have been applied. \n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258\n\n5. Bugs fixed (https://bugzilla.redhat.com/):\n\n1962650 - CVE-2020-24489 hw: vt-d related privilege escalation\n1962666 - CVE-2020-24513 hw: information disclosure on some Intel Atom processors\n1962702 - CVE-2020-24511 hw: improper isolation of shared resources in some Intel Processors\n1962722 - CVE-2020-24512 hw: observable timing discrepancy in some Intel Processors\n\n6. 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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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