CVE-2019-14284: Divide by Zero

Published Jul 26, 2019
·
Updated

In the Linux kernel before 5.2.3, drivers/block/floppy.c allows a denial of service by setupformatparams division-by-zero. Two consecutive ioctls can trigger the bug: the first one should set the drive geometry with .sect and .rate values that make FSECTPERTRACK be zero. Next, the floppy format operation should be called. It can be triggered by an unprivileged local user even when a floppy disk has not been inserted. NOTE: QEMU creates the floppy device by default.

Affected Software

45 affected componentsFixes available
Linux Linux kernel<5.2.3
ubuntu/linux-aws<4.4.0-1054.58
4.4.0-1054.58
ubuntu/linux-azure<4.15.0-1059.64~14.04.1
4.15.0-1059.64~14.04.1
ubuntu/linux-lts-xenial<4.4.0-164.192~14.04.1
4.4.0-164.192~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-161.189
4.4.0-161.189
ubuntu/linux-aws<4.4.0-1092.103
4.4.0-1092.103
ubuntu/linux-aws-hwe<4.15.0-1047.49~16.04.1
4.15.0-1047.49~16.04.1
ubuntu/linux-azure<4.15.0-1056.61
4.15.0-1056.61
ubuntu/linux-gcp<4.15.0-1041.43
4.15.0-1041.43
ubuntu/linux-hwe<4.15.0-60.67~16.04.1
4.15.0-60.67~16.04.1
ubuntu/linux-kvm<4.4.0-1056.63
4.4.0-1056.63
ubuntu/linux-oracle<4.15.0-1022.25~16.04.1
4.15.0-1022.25~16.04.1
ubuntu/linux-raspi2<4.4.0-1120.129
4.4.0-1120.129
ubuntu/linux-snapdragon<4.4.0-1124.130
4.4.0-1124.130
ubuntu/linux-fips<4.4.0-1019.24
4.4.0-1019.24
ubuntu/linux-fips*
ubuntu/linux<4.15.0-60.67
4.15.0-60.67
ubuntu/linux-aws<4.15.0-1047.49
4.15.0-1047.49
ubuntu/linux-azure<5.0.0-1018.19~18.04.1
5.0.0-1018.19~18.04.1
ubuntu/linux-gcp<4.15.0-1042.45
4.15.0-1042.45
ubuntu/linux-gke-4.15<4.15.0-1041.43
4.15.0-1041.43
ubuntu/linux-gke-5.0<5.0.0-1015.15~18.04.1
5.0.0-1015.15~18.04.1
ubuntu/linux-hwe<5.0.0-27.28~18.04.1
5.0.0-27.28~18.04.1
ubuntu/linux-kvm<4.15.0-1043.43
4.15.0-1043.43
ubuntu/linux-oem<4.15.0-1056.65
4.15.0-1056.65
ubuntu/linux-oem-osp1<5.0.0-1020.22
5.0.0-1020.22
ubuntu/linux-oracle<4.15.0-1022.25
4.15.0-1022.25
ubuntu/linux-raspi2<4.15.0-1044.47
4.15.0-1044.47
ubuntu/linux-snapdragon<4.15.0-1062.69
4.15.0-1062.69
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-fips<4.15.0-2018.18
4.15.0-2018.18
ubuntu/linux-azure-fips<4.15.0-2006.7
4.15.0-2006.7
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-azure-fde*
ubuntu/linux-gke*
ubuntu/linux-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.4.0-1054.58
  2. Upgrade

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

    Fixed in 4.15.0-1059.64~14.04.1
  3. Upgrade

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

    Fixed in 4.4.0-164.192~14.04.1
  4. Upgrade

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

    Fixed in 4.4.0-161.189
  5. Upgrade

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

    Fixed in 4.4.0-1092.103
  6. Upgrade

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

    Fixed in 4.15.0-1047.49~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-1056.61
  8. Upgrade

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

    Fixed in 4.15.0-1041.43
  9. Upgrade

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

    Fixed in 4.15.0-60.67~16.04.1
  10. Upgrade

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

    Fixed in 4.4.0-1056.63
  11. Upgrade

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

    Fixed in 4.15.0-1022.25~16.04.1
  12. Upgrade

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

    Fixed in 4.4.0-1120.129
  13. Upgrade

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

    Fixed in 4.4.0-1124.130
  14. Upgrade

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

    Fixed in 4.4.0-1019.24
  15. Upgrade

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

    Fixed in 4.15.0-60.67
  16. Upgrade

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

    Fixed in 4.15.0-1047.49
  17. Upgrade

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

    Fixed in 5.0.0-1018.19~18.04.1
  18. Upgrade

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

    Fixed in 4.15.0-1042.45
  19. Upgrade

    Upgrade ubuntu/linux-gke-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1041.43
  20. Upgrade

    Upgrade ubuntu/linux-gke-5.0 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1015.15~18.04.1
  21. Upgrade

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

    Fixed in 5.0.0-27.28~18.04.1
  22. Upgrade

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

    Fixed in 4.15.0-1043.43
  23. Upgrade

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

    Fixed in 4.15.0-1056.65
  24. Upgrade

    Upgrade ubuntu/linux-oem-osp1 to a version that resolves this vulnerability.

    Fixed in 5.0.0-1020.22
  25. Upgrade

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

    Fixed in 4.15.0-1022.25
  26. Upgrade

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

    Fixed in 4.15.0-1044.47
  27. Upgrade

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

    Fixed in 4.15.0-1062.69
  28. Upgrade

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

    Fixed in 4.15.0-2018.18
  29. Upgrade

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

    Fixed in 4.15.0-2006.7
  30. 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 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1

Event History

Jul 26, 2019
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
Event
via OSV·12:00 AM
CVE Published
via MITRE·12:25 PM
Data Sourced
via MITRE·12:25 PM
Description
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected 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-2019-14284?

CVE-2019-14284 has a severity rating that allows for denial of service vulnerabilities in the Linux kernel, which can cause system crashes.

2

How do I fix CVE-2019-14284?

To fix CVE-2019-14284, upgrade to a Linux kernel version 5.2.3 or later.

3

What are the affected versions for CVE-2019-14284?

CVE-2019-14284 affects versions of the Linux kernel prior to 5.2.3.

4

What type of vulnerability is CVE-2019-14284?

CVE-2019-14284 is a denial of service vulnerability caused by a division-by-zero error in the Linux kernel.

5

Which Linux distributions are affected by CVE-2019-14284?

CVE-2019-14284 affects various Linux distributions utilizing the vulnerable versions of the Linux kernel prior to 5.2.3.

Company

Resources

Contact

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