CVE-2018-18690: Medium severity Linux Linux kernel vulnerability

Published Oct 26, 2018
·
Updated

In the Linux kernel before 4.17, a local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfsattrshortformaddname in fs/xfs/libxfs/xfsattr.c mishandles ATTRREPLACE operations with conversion of an attr from short to long form.

Affected Software

40 affected componentsFixes available
Linux Linux kernel<4.17
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Debian Debian Linux=8.0
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-17.2.13-1
ubuntu/linux<3.13.0-164.214
3.13.0-164.214
ubuntu/linux-aws<4.4.0-1037.40
4.4.0-1037.40
ubuntu/linux-azure<4.15.0-1036.38~14.04.2
4.15.0-1036.38~14.04.2
ubuntu/linux-lts-xenial<4.4.0-141.167~14.04.1
4.4.0-141.167~14.04.1
ubuntu/linux<4.4.0-141.167
4.4.0-141.167
ubuntu/linux-aws<4.4.0-1074.84
4.4.0-1074.84
ubuntu/linux-azure<4.15.0-1036.38~16.04.1
4.15.0-1036.38~16.04.1
ubuntu/linux-gcp<4.15.0-1026.27~16.04.1
4.15.0-1026.27~16.04.1
ubuntu/linux-hwe<4.15.0-43.46~16.04.1
4.15.0-43.46~16.04.1
ubuntu/linux-kvm<4.4.0-1039.45
4.4.0-1039.45
ubuntu/linux-raspi2<4.4.0-1102.110
4.4.0-1102.110
ubuntu/linux-snapdragon<4.4.0-1106.111
4.4.0-1106.111
ubuntu/linux-fips<4.4.0-1008.10
4.4.0-1008.10
ubuntu/linux<4.15.0-43.46
4.15.0-43.46
ubuntu/linux-aws<4.15.0-1031.33
4.15.0-1031.33
ubuntu/linux-azure<4.15.0-1036.38
4.15.0-1036.38
ubuntu/linux-gcp<4.15.0-1026.27
4.15.0-1026.27
ubuntu/linux-kvm<4.15.0-1028.28
4.15.0-1028.28
ubuntu/linux-oem<4.15.0-1030.35
4.15.0-1030.35
ubuntu/linux-raspi2<4.15.0-1030.32
4.15.0-1030.32
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 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 7.2.12-1Fixed in 7.2.13-1
  2. Upgrade

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

    Fixed in 3.13.0-164.214
  3. Upgrade

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

    Fixed in 4.4.0-1037.40
  4. Upgrade

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

    Fixed in 4.15.0-1036.38~14.04.2
  5. Upgrade

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

    Fixed in 4.4.0-141.167~14.04.1
  6. Upgrade

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

    Fixed in 4.4.0-141.167
  7. Upgrade

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

    Fixed in 4.4.0-1074.84
  8. Upgrade

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

    Fixed in 4.15.0-1036.38~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-1026.27~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-43.46~16.04.1
  11. Upgrade

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

    Fixed in 4.4.0-1039.45
  12. Upgrade

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

    Fixed in 4.4.0-1102.110
  13. Upgrade

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

    Fixed in 4.4.0-1106.111
  14. Upgrade

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

    Fixed in 4.4.0-1008.10
  15. Upgrade

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

    Fixed in 4.15.0-43.46
  16. Upgrade

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

    Fixed in 4.15.0-1031.33
  17. Upgrade

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

    Fixed in 4.15.0-1036.38
  18. Upgrade

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

    Fixed in 4.15.0-1026.27
  19. Upgrade

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

    Fixed in 4.15.0-1028.28
  20. Upgrade

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

    Fixed in 4.15.0-1030.35
  21. Upgrade

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

    Fixed in 4.15.0-1030.32
  22. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in 4.17

Event History

Oct 26, 2018
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·06:00 PM
Data Sourced
via MITRE·06:00 PM
Description
Data Sourced
via NVD·06:29 PM
RemedyDescriptionSeverityWeaknessAffected Software

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2018-18690?

CVE-2018-18690 is classified as a moderate severity vulnerability due to its potential impact on filesystem operations.

2

How do I fix CVE-2018-18690?

To fix CVE-2018-18690, upgrade to a kernel version that is 4.17 or newer.

3

Which systems are affected by CVE-2018-18690?

CVE-2018-18690 affects Linux kernel versions prior to 4.17 as well as specific Ubuntu and Debian releases.

4

What is the nature of the issue in CVE-2018-18690?

CVE-2018-18690 involves an unchecked error condition during an xfs attribute change, which can render the filesystem non-operational.

5

Can CVE-2018-18690 be exploited locally?

Yes, CVE-2018-18690 can be exploited by a local attacker with the ability to set attributes on an xfs filesystem.

Company

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Contact

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