CVE-2020-10757: Buffer Overflow

Published Jun 1, 2020
·
Updated

A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.

Other sources

A flaw was found in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.

A flaw was found in the way mremap handled DAX hugepages. A local attacker could use this flaw to escalate their privileges on the system by being able to control PTEs and effectively creating physical to virtual mappings at will.

— Red Hat

Affected Software

34 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1127.18.2.rt56.1116.el7
0:3.10.0-1127.18.2.rt56.1116.el7
redhat/kernel<0:3.10.0-1127.18.2.el7
0:3.10.0-1127.18.2.el7
redhat/kernel<0:3.10.0-957.58.2.el7
0:3.10.0-957.58.2.el7
redhat/kernel<0:3.10.0-1062.33.1.el7
0:3.10.0-1062.33.1.el7
redhat/kernel-rt<0:4.18.0-193.13.2.rt13.65.el8_2
0:4.18.0-193.13.2.rt13.65.el8_2
redhat/kernel<0:4.18.0-193.13.2.el8_2
0:4.18.0-193.13.2.el8_2
redhat/kernel<0:4.18.0-80.27.1.el8_0
0:4.18.0-80.27.1.el8_0
redhat/kernel<0:4.18.0-147.24.2.el8_1
0:4.18.0-147.24.2.el8_1
Linux Linux kernel>=4.5<4.9.227
Linux Linux kernel>=4.10<4.14.184
Linux Linux kernel>=4.15<4.19.127
Linux Linux kernel>=4.20<5.4.45
Linux Linux kernel>=5.5<5.6.17
Linux Linux kernel>=5.7<5.7.1
openSUSE Leap=15.1
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
redhat Enterprise MRG=2.0
Fedoraproject Fedora=31
Debian Debian Linux=8.0
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
NetApp Active Iq Unified Manager Vmware Vsphere
NetApp Cloud Backup
NetApp Steelstore Cloud Integrated Storage
Linux Linux kernel>=4.5.1<=5.6.16
Linux Linux kernel=4.5-rc2
Linux Linux kernel=4.5-rc3
Linux Linux kernel=4.5-rc4
Linux Linux kernel=4.5-rc5
Linux Linux kernel=4.5-rc6
Linux Linux kernel=4.5-rc7
debian/linux
5.10.223-15.10.262-16.1.176-16.1.180-16.12.94-16.12.101-17.1.7-17.1.8-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1127.18.2.rt56.1116.el7
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1127.18.2.el7
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-957.58.2.el7
  4. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.33.1.el7
  5. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.13.2.rt13.65.el8_2
  6. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.13.2.el8_2
  7. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-80.27.1.el8_0
  8. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-147.24.2.el8_1
  9. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.262-1Fixed in 6.1.176-1Fixed in 6.1.180-1Fixed in 6.12.94-1Fixed in 6.12.101-1Fixed in 7.1.7-1Fixed in 7.1.8-1
  10. Compensating control

    Do not use DAX enabled storage (mitigation to prevent exploitation of the mremap DAX huge pages flaw).

Event History

Jun 1, 2020
Data Sourced
via Red Hat·01:11 PM
DescriptionSeverityAffected Software
Jun 4, 2020
CVE Published
09:00 AM
Jun 9, 2020
CVE Published
via MITRE·12:40 PM
Data Sourced
via MITRE·12:40 PM
DescriptionWeakness
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 11, 2024
Data Sourced
via Launchpad·11:36 PM
Description
Jul 4, 2026
Data Sourced
via Ubuntu·03:49 PM
RemedyDescriptionSeverityAffected Software
Aug 12, 2026
Data Sourced
via Debian·12:06 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2020-10757?

CVE-2020-10757 has been classified with a medium severity level due to its potential for privilege escalation.

2

How do I fix CVE-2020-10757?

To fix CVE-2020-10757, update your Linux Kernel to versions 3.10.0-1127.18.2.el7 or later, or follow your distribution's recommendations for patches.

3

Who is affected by CVE-2020-10757?

CVE-2020-10757 affects versions of the Linux Kernel after 4.5-rc1, particularly systems using DAX enabled storage.

4

What type of vulnerability is CVE-2020-10757?

CVE-2020-10757 is a privilege escalation vulnerability related to how the Linux Kernel handles DAX Huge Pages.

5

What is the impact of CVE-2020-10757?

The impact of CVE-2020-10757 allows a local attacker to escalate their privileges on the system if they have access to vulnerable DAX enabled storage.

Company

Resources

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