CVE-2019-16231: Null Pointer Dereference

Published Sep 11, 2019
·
Updated

A flaw was found in the Linux kernel. A NULL pointer dereference flaw was found in the FUJITSU Extended Socket Network driver. A call to the allocworkqueue return was not validated and causes a denial of service at the time of failure. The highest threat from this vulnerability is to system availability.

Other sources

A NULL pointer dereference flaw was found in fjesprobe in drivers/net/fjes/fjesmain.c in FUJITSU Extended Socket Network driver. Here a call to allocworkqueue return was not validated and can cause a denial of service at the time of failure. This could allow an attacker to crash the system or leak kernel internal information.

Reference: https://security.netapp.com/advisory/ntap-20191004-0001/ https://lkml.org/lkml/2019/9/9/487

— Red Hat

drivers/net/fjes/fjesmain.c in the Linux kernel 5.2.14 does not check the allocworkqueue return value, leading to a NULL pointer dereference.

— Ubuntu

Affected Software

64 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.rt56.1131.el7
0:3.10.0-1160.rt56.1131.el7
redhat/kernel<0:3.10.0-1160.el7
0:3.10.0-1160.el7
redhat/kernel-rt<0:4.18.0-240.rt7.54.el8
0:4.18.0-240.rt7.54.el8
redhat/kernel<0:4.18.0-240.el8
0:4.18.0-240.el8
Linux Linux kernel=5.2.14
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.04
Canonical Ubuntu Linux=19.10
openSUSE Leap=15.0
openSUSE Leap=15.1
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
debian/linux<=6.1.176-1, <=6.1.190-1, <=6.12.107-1, <=6.12.113-1, <=7.2.12-1, <=7.2.13-1
ubuntu/linux-aws<4.4.0-1090.94
4.4.0-1090.94
ubuntu/linux-azure<4.15.0-1066.71~14.04.1
4.15.0-1066.71~14.04.1
ubuntu/linux-lts-xenial<4.4.0-208.240~14.04.1
4.4.0-208.240~14.04.1
ubuntu/linux<4.4.0-208.240
4.4.0-208.240
ubuntu/linux-aws<4.4.0-1126.140
4.4.0-1126.140
ubuntu/linux-aws-hwe<4.15.0-1057.59~16.04.1
4.15.0-1057.59~16.04.1
ubuntu/linux-azure<4.15.0-1066.71
4.15.0-1066.71
ubuntu/linux-gcp<4.15.0-1052.56
4.15.0-1052.56
ubuntu/linux-hwe<4.15.0-74.83~16.04.1
4.15.0-74.83~16.04.1
ubuntu/linux-kvm<4.4.0-1091.100
4.4.0-1091.100
ubuntu/linux-oracle<4.15.0-1031.34~16.04.1
4.15.0-1031.34~16.04.1
ubuntu/linux-raspi2<4.4.0-1150.161
4.4.0-1150.161
ubuntu/linux-snapdragon<4.4.0-1154.164
4.4.0-1154.164
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1060.66
4.4.0-1060.66
ubuntu/linux-fips*
ubuntu/linux<4.15.0-74.84
4.15.0-74.84
ubuntu/linux-aws<4.15.0-1057.59
4.15.0-1057.59
ubuntu/linux-aws-5.0<5.0.0-1023.26~18.04.1
5.0.0-1023.26~18.04.1
ubuntu/linux-azure<5.0.0-1028.30~18.04.1
5.0.0-1028.30~18.04.1
ubuntu/linux-azure-5.3<5.3.0-1009.10~18.04.1
5.3.0-1009.10~18.04.1
ubuntu/linux-gcp<5.0.0-1028.29~18.04.1
5.0.0-1028.29~18.04.1
ubuntu/linux-gcp-5.3<5.3.0-1010.11~18.04.1
5.3.0-1010.11~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1050.53
4.15.0-1050.53
ubuntu/linux-gke-5.0<5.0.0-1027.28~18.04.1
5.0.0-1027.28~18.04.1
ubuntu/linux-hwe<5.3.0-26.28~18.04.1
5.3.0-26.28~18.04.1
ubuntu/linux-kvm<4.15.0-1052.52
4.15.0-1052.52
ubuntu/linux-oem<4.15.0-1066.76
4.15.0-1066.76
ubuntu/linux-oem-osp1<5.0.0-1033.38
5.0.0-1033.38
ubuntu/linux-oracle<4.15.0-1031.34
4.15.0-1031.34
ubuntu/linux-oracle-5.0<5.0.0-1009.14~18.04.1
5.0.0-1009.14~18.04.1
ubuntu/linux-raspi2<4.15.0-1053.57
4.15.0-1053.57
ubuntu/linux-snapdragon<4.15.0-1070.77
4.15.0-1070.77
ubuntu/linux-azure-edge*
ubuntu/linux-gcp-edge*
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-raspi2*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*

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 0:3.10.0-1160.rt56.1131.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1160.el7
  3. Upgrade

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

    Fixed in 0:4.18.0-240.rt7.54.el8
  4. Upgrade

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

    Fixed in 0:4.18.0-240.el8
  5. Upgrade

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

    Fixed in 4.4.0-1090.94
  6. Upgrade

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

    Fixed in 4.15.0-1066.71~14.04.1
  7. Upgrade

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

    Fixed in 4.4.0-208.240~14.04.1
  8. Upgrade

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

    Fixed in 4.4.0-208.240
  9. Upgrade

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

    Fixed in 4.4.0-1126.140
  10. Upgrade

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

    Fixed in 4.15.0-1057.59~16.04.1
  11. Upgrade

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

    Fixed in 4.15.0-1066.71
  12. Upgrade

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

    Fixed in 4.15.0-1052.56
  13. Upgrade

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

    Fixed in 4.15.0-74.83~16.04.1
  14. Upgrade

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

    Fixed in 4.4.0-1091.100
  15. Upgrade

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

    Fixed in 4.15.0-1031.34~16.04.1
  16. Upgrade

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

    Fixed in 4.4.0-1150.161
  17. Upgrade

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

    Fixed in 4.4.0-1154.164
  18. Upgrade

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

    Fixed in 4.4.0-1060.66
  19. Upgrade

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

    Fixed in 4.15.0-74.84
  20. Upgrade

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

    Fixed in 4.15.0-1057.59
  21. Upgrade

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

    Fixed in 5.0.0-1023.26~18.04.1
  22. Upgrade

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

    Fixed in 5.0.0-1028.30~18.04.1
  23. Upgrade

    Upgrade ubuntu/linux-azure-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1009.10~18.04.1
  24. Upgrade

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

    Fixed in 5.0.0-1028.29~18.04.1
  25. Upgrade

    Upgrade ubuntu/linux-gcp-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1010.11~18.04.1
  26. Upgrade

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

    Fixed in 4.15.0-1050.53
  27. Upgrade

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

    Fixed in 5.0.0-1027.28~18.04.1
  28. Upgrade

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

    Fixed in 5.3.0-26.28~18.04.1
  29. Upgrade

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

    Fixed in 4.15.0-1052.52
  30. Upgrade

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

    Fixed in 4.15.0-1066.76
  31. Upgrade

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

    Fixed in 5.0.0-1033.38
  32. Upgrade

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

    Fixed in 4.15.0-1031.34
  33. Upgrade

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

    Fixed in 5.0.0-1009.14~18.04.1
  34. Upgrade

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

    Fixed in 4.15.0-1053.57
  35. Upgrade

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

    Fixed in 4.15.0-1070.77
  36. Upgrade

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

    Fixed in 4.15.0-2018.18
  37. Upgrade

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

    Fixed in 4.15.0-2006.7

Event History

Sep 11, 2019
CVE Published
12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·03:30 PM
Data Sourced
via MITRE·03:30 PM
Description
Data Sourced
via OSV·04:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 10, 2019
Data Sourced
via Red Hat·11:15 AM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2019-16231?

CVE-2019-16231 has a high severity rating due to its potential to cause denial of service.

2

How do I fix CVE-2019-16231?

To fix CVE-2019-16231, update to the recommended kernel versions provided by your distribution.

3

What systems are affected by CVE-2019-16231?

CVE-2019-16231 affects various Linux kernel versions including those on Red Hat, Ubuntu, and openSUSE.

4

What exploit does CVE-2019-16231 present?

CVE-2019-16231 presents an exploit that could lead to a NULL pointer dereference in the FUJITSU Extended Socket Network driver.

5

Is there a patch available for CVE-2019-16231?

Yes, patches are available for CVE-2019-16231 in the form of updated kernel packages.

Company

Resources

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