CVE-2019-7222: Infoleak

Published Feb 2, 2019
·
Updated

An information leakage issue was found in the way Linux kernel's KVM hypervisor handled page fault exception while emulating instructions like VMXON, VMCLEAR, VMPTRLD, VMWRITE with memory address as an operand. It occurs if the operand is an mmio address, as the returned exception object holds uninitialised stack memory contents.

A guest user/process could use this flaw to leak host's stack memory contents to a guest.

It affects only Intel processors and only when nested virtualization is enabled.

Upstream patch: --------------- -> https://git.kernel.org/linus/353c0956a618a07ba4bbe7ad00ff29fe70e8412a

Reference: ---------- -> https://www.openwall.com/lists/oss-security/2019/02/18/2

Other sources

An information leakage issue was found in the way Linux kernel's KVM hypervisor handled page fault exceptions while emulating instructions like VMXON, VMCLEAR, VMPTRLD, and VMWRITE with memory address as an operand. It occurs if the operand is a mmio address, as the returned exception object holds uninitialized stack memory contents. A guest user/process could use this flaw to leak host's stack memory contents to a guest.

The KVM implementation in the Linux kernel through 4.20.5 has an Information Leak.

— Ubuntu

Affected Software

79 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1062.rt56.1022.el7
0:3.10.0-1062.rt56.1022.el7
redhat/kernel<0:3.10.0-1062.el7
0:3.10.0-1062.el7
redhat/kernel-rt<0:4.18.0-147.rt24.93.el8
0:4.18.0-147.rt24.93.el8
redhat/kernel<0:4.18.0-147.el8
0:4.18.0-147.el8
Linux Linux kernel<=4.20.5
Fedoraproject Fedora=28
Fedoraproject Fedora=29
openSUSE Leap=15.0
Debian Debian Linux=8.0
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
NetApp Active Iq Performance Analytics Services
NetApp Element Software Management Node
redhat Enterprise Linux=8.0
redhat Enterprise Linux Desktop=7.0
redhat Enterprise Linux Eus=8.1
redhat Enterprise Linux Eus=8.2
redhat Enterprise Linux Eus=8.4
redhat Enterprise Linux Eus=8.6
redhat Enterprise Linux For Real Time=7
redhat Enterprise Linux For Real Time=8
redhat Enterprise Linux For Real Time For Nfv=7
redhat Enterprise Linux For Real Time For Nfv Tus=8.2
redhat Enterprise Linux For Real Time For Nfv Tus=8.4
redhat Enterprise Linux For Real Time For Nfv Tus=8.6
redhat Enterprise Linux For Real Time Tus=8.2
redhat Enterprise Linux For Real Time Tus=8.4
redhat Enterprise Linux For Real Time Tus=8.6
redhat Enterprise Linux Server=7.0
redhat Enterprise Linux Server Aus=8.2
redhat Enterprise Linux Server Aus=8.4
redhat Enterprise Linux Server Aus=8.6
redhat Enterprise Linux Server Tus=8.2
redhat Enterprise Linux Server Tus=8.4
redhat Enterprise Linux Server Tus=8.6
redhat Enterprise Linux Workstation=7.0
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-1
ubuntu/linux<3.13.0-168.218
3.13.0-168.218
ubuntu/linux-aws<4.4.0-1040.43
4.4.0-1040.43
ubuntu/linux-azure<4.15.0-1041.45~14.04.1
4.15.0-1041.45~14.04.1
ubuntu/linux-lts-xenial<4.4.0-144.170~14.04.1
4.4.0-144.170~14.04.1
ubuntu/linux<4.4.0-145.171
4.4.0-145.171
ubuntu/linux-aws<4.4.0-1079.89
4.4.0-1079.89
ubuntu/linux-aws-hwe<4.15.0-1035.37~16.04.1
4.15.0-1035.37~16.04.1
ubuntu/linux-azure<4.15.0-1041.45
4.15.0-1041.45
ubuntu/linux-gcp<4.15.0-1029.31~16.04.1
4.15.0-1029.31~16.04.1
ubuntu/linux-hwe<4.15.0-47.50~16.04.1
4.15.0-47.50~16.04.1
ubuntu/linux-kvm<4.4.0-1043.49
4.4.0-1043.49
ubuntu/linux-oracle<4.15.0-1010.12~16.04.1
4.15.0-1010.12~16.04.1
ubuntu/linux-raspi2<4.4.0-1106.114
4.4.0-1106.114
ubuntu/linux-snapdragon<4.4.0-1110.115
4.4.0-1110.115
ubuntu/linux-fips<4.4.0-1008.10
4.4.0-1008.10
ubuntu/linux<4.15.0-47.50
4.15.0-47.50
ubuntu/linux-aws<4.15.0-1035.37
4.15.0-1035.37
ubuntu/linux-azure<4.18.0-1014.14~18.04.1
4.18.0-1014.14~18.04.1
ubuntu/linux-gcp<4.15.0-1029.31
4.15.0-1029.31
ubuntu/linux-gcp-edge<4.18.0-1008.9~18.04.1
4.18.0-1008.9~18.04.1
ubuntu/linux-hwe<4.18.0-17.18~18.04.1
4.18.0-17.18~18.04.1
ubuntu/linux-kvm<4.15.0-1031.31
4.15.0-1031.31
ubuntu/linux-oem<4.15.0-1035.40
4.15.0-1035.40
ubuntu/linux-oracle<4.15.0-1010.12
4.15.0-1010.12
ubuntu/linux-raspi2<4.15.0-1033.35
4.15.0-1033.35
ubuntu/linux-snapdragon<4.15.0-1053.57
4.15.0-1053.57
ubuntu/linux-azure-fde*
ubuntu/linux-azure-fde-5.15*
ubuntu/linux-gke*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-azure-6.11*
ubuntu/linux-gcp-6.11*
ubuntu/linux-hwe-6.11*
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-raspi-realtime*

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 0:3.10.0-1062.rt56.1022.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1062.el7
  3. Upgrade

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

    Fixed in 0:4.18.0-147.rt24.93.el8
  4. Upgrade

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

    Fixed in 0:4.18.0-147.el8
  5. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1
  6. Upgrade

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

    Fixed in 3.13.0-168.218
  7. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1040.43
  8. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1041.45~14.04.1
  9. Upgrade

    Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0-144.170~14.04.1
  10. Upgrade

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

    Fixed in 4.4.0-145.171
  11. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1079.89
  12. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1035.37~16.04.1
  13. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1041.45
  14. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1029.31~16.04.1
  15. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-47.50~16.04.1
  16. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.4.0-1043.49
  17. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1010.12~16.04.1
  18. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.4.0-1106.114
  19. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.4.0-1110.115
  20. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.4.0-1008.10
  21. Upgrade

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

    Fixed in 4.15.0-47.50
  22. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1035.37
  23. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.18.0-1014.14~18.04.1
  24. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1029.31
  25. Upgrade

    Upgrade ubuntu/linux-gcp-edge to a version that resolves this vulnerability.

    Fixed in 4.18.0-1008.9~18.04.1
  26. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.18.0-17.18~18.04.1
  27. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1031.31
  28. Upgrade

    Upgrade ubuntu/linux-oem to a version that resolves this vulnerability.

    Fixed in 4.15.0-1035.40
  29. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1010.12
  30. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1033.35
  31. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.15.0-1053.57
  32. Upgrade

    Upgrade Linux kernel KVM to a version that resolves this vulnerability.

    Patch 353c0956a618a07ba4bbe7ad00ff29fe70e8412a

Event History

Feb 2, 2019
Data Sourced
via Red Hat·07:08 AM
DescriptionSeverityAffected Software
Feb 7, 2019
CVE Published
12:00 AM
Mar 17, 2019
CVE Published
via MITRE·06:52 PM
Data Sourced
via MITRE·06:52 PM
Description
Mar 21, 2019
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:01 PM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2019-7222?

CVE-2019-7222 has been classified as a medium severity vulnerability.

2

How do I fix CVE-2019-7222?

To mitigate CVE-2019-7222, update your kernel to the version specified in the remedy for your Linux distribution.

3

Which versions are affected by CVE-2019-7222?

CVE-2019-7222 affects various versions of the Linux kernel, specifically those up to 4.20.5.

4

Is my system vulnerable to CVE-2019-7222?

To determine if your system is vulnerable to CVE-2019-7222, check the Linux kernel version against the affected versions.

5

What types of systems are affected by CVE-2019-7222?

CVE-2019-7222 impacts the Linux kernel, impacting systems running various distributions like Red Hat, Fedora, Debian, and Ubuntu.

Company

Resources

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