CVE-2019-17055: Medium severity Linux Linux kernel vulnerability

Published Sep 20, 2019
·
Updated

A vulnerability was found in basesockcreate in drivers/isdn/mISDN/socket.c in the AFISDN network module in the Linux kernel does not enforce CAPNETRAW, which means that unprivileged users can create a raw socket.

Reference:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b91ee4aa2a2199ba4d4650706c272985a5a32d80

Other sources

A vulnerability was found in the Linux kernel’s implementation of the AFISDN protocol, which does not enforce the CAPNETRAW capability. This flaw can allow unprivileged users to create a raw socket for this protocol. This could further allow the user to control the availability of an existing ISDN circuit.

basesockcreate in drivers/isdn/mISDN/socket.c in the AFISDN network module in the Linux kernel through 5.3.2 does not enforce CAPNETRAW, which means that unprivileged users can create a raw socket, aka CID-b91ee4aa2a21.

— Ubuntu

Affected Software

62 affected componentsFixes available
redhat/kernel<0:2.6.32-754.28.1.el6
0:2.6.32-754.28.1.el6
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<0:4.18.0-193.rt13.51.el8
0:4.18.0-193.rt13.51.el8
redhat/kernel<0:4.18.0-193.el8
0:4.18.0-193.el8
Linux Linux kernel<=5.3.2
Debian Debian Linux=8.0
Fedoraproject Fedora=29
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.04
openSUSE Leap=15.0
openSUSE Leap=15.1
redhat Enterprise Linux Desktop=6.0
redhat Enterprise Linux Server=6.0
redhat Enterprise Linux Workstation=6.0
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-1
ubuntu/linux-aws<4.4.0-1058.62
4.4.0-1058.62
ubuntu/linux-azure<4.15.0-1063.68~14.04.1
4.15.0-1063.68~14.04.1
ubuntu/linux-lts-xenial<4.4.0-168.197~14.04.1
4.4.0-168.197~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-168.197
4.4.0-168.197
ubuntu/linux-aws<4.4.0-1098.109
4.4.0-1098.109
ubuntu/linux-aws-hwe<4.15.0-1054.56~16.04.1
4.15.0-1054.56~16.04.1
ubuntu/linux-azure<4.15.0-1063.68
4.15.0-1063.68
ubuntu/linux-gcp<4.15.0-1049.52
4.15.0-1049.52
ubuntu/linux-hwe<4.15.0-69.78~16.04.1
4.15.0-69.78~16.04.1
ubuntu/linux-kvm<4.4.0-1062.69
4.4.0-1062.69
ubuntu/linux-oracle<4.15.0-1029.32~16.04.1
4.15.0-1029.32~16.04.1
ubuntu/linux-raspi2<4.4.0-1125.134
4.4.0-1125.134
ubuntu/linux-snapdragon<4.4.0-1129.137
4.4.0-1129.137
ubuntu/linux-fips<4.4.0-1025.30
4.4.0-1025.30
ubuntu/linux-fips*
ubuntu/linux<4.15.0-69.78
4.15.0-69.78
ubuntu/linux-aws<4.15.0-1054.56
4.15.0-1054.56
ubuntu/linux-azure<5.0.0-1025.27~18.04.1
5.0.0-1025.27~18.04.1
ubuntu/linux-gcp<5.0.0-1025.26~18.04.1
5.0.0-1025.26~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1048.51
4.15.0-1048.51
ubuntu/linux-gke-5.0<5.0.0-1025.26~18.04.1
5.0.0-1025.26~18.04.1
ubuntu/linux-hwe<5.0.0-35.38~18.04.1
5.0.0-35.38~18.04.1
ubuntu/linux-kvm<4.15.0-1050.50
4.15.0-1050.50
ubuntu/linux-oem<4.15.0-1063.72
4.15.0-1063.72
ubuntu/linux-oem-osp1<5.0.0-1027.31
5.0.0-1027.31
ubuntu/linux-oracle<4.15.0-1029.32
4.15.0-1029.32
ubuntu/linux-raspi2<4.15.0-1050.54
4.15.0-1050.54
ubuntu/linux-snapdragon<4.15.0-1067.74
4.15.0-1067.74
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-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-raspi-realtime*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 0:2.6.32-754.28.1.el6
  2. Upgrade

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

    Fixed in 0:3.10.0-1160.rt56.1131.el7
  3. Upgrade

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

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

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

    Fixed in 0:4.18.0-193.rt13.51.el8
  5. Upgrade

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

    Fixed in 0:4.18.0-193.el8
  6. 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
  7. Upgrade

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

    Fixed in 4.4.0-1058.62
  8. Upgrade

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

    Fixed in 4.15.0-1063.68~14.04.1
  9. Upgrade

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

    Fixed in 4.4.0-168.197~14.04.1
  10. Upgrade

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

    Fixed in 4.4.0-168.197
  11. Upgrade

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

    Fixed in 4.4.0-1098.109
  12. Upgrade

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

    Fixed in 4.15.0-1054.56~16.04.1
  13. Upgrade

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

    Fixed in 4.15.0-1063.68
  14. Upgrade

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

    Fixed in 4.15.0-1049.52
  15. Upgrade

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

    Fixed in 4.15.0-69.78~16.04.1
  16. Upgrade

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

    Fixed in 4.4.0-1062.69
  17. Upgrade

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

    Fixed in 4.15.0-1029.32~16.04.1
  18. Upgrade

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

    Fixed in 4.4.0-1125.134
  19. Upgrade

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

    Fixed in 4.4.0-1129.137
  20. Upgrade

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

    Fixed in 4.4.0-1025.30
  21. Upgrade

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

    Fixed in 4.15.0-69.78
  22. Upgrade

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

    Fixed in 4.15.0-1054.56
  23. Upgrade

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

    Fixed in 5.0.0-1025.27~18.04.1
  24. Upgrade

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

    Fixed in 5.0.0-1025.26~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-1048.51
  26. Upgrade

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

    Fixed in 5.0.0-1025.26~18.04.1
  27. Upgrade

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

    Fixed in 5.0.0-35.38~18.04.1
  28. Upgrade

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

    Fixed in 4.15.0-1050.50
  29. Upgrade

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

    Fixed in 4.15.0-1063.72
  30. Upgrade

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

    Fixed in 5.0.0-1027.31
  31. Upgrade

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

    Fixed in 4.15.0-1029.32
  32. Upgrade

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

    Fixed in 4.15.0-1050.54
  33. Upgrade

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

    Fixed in 4.15.0-1067.74
  34. Upgrade

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

    Fixed in 4.15.0-2018.18
  35. Upgrade

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

    Fixed in 4.15.0-2006.7
  36. Configuration

    Blacklist the mISDN_core.ko kernel module to prevent it from being loaded.

    mISDN_core.ko kernel module blacklist = blacklisted

Event History

Sep 20, 2019
CVE Published
12:00 AM
Oct 1, 2019
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·01:10 PM
Data Sourced
via MITRE·01:10 PM
Description
Data Sourced
via OSV·02:15 PM
DescriptionSeverityAffected Software
Event
via OSV·02:15 PM
Data Sourced
via NVD·02:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 3, 2019
Data Sourced
via Red Hat·04:49 PM
DescriptionSeverityAffected 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-2019-17055?

CVE-2019-17055 is classified as a medium severity vulnerability due to its potential exploitation by unprivileged users.

2

How do I fix CVE-2019-17055?

To fix CVE-2019-17055, upgrade to the recommended kernel versions provided by your Linux distribution, such as Red Hat or Debian.

3

Which systems are affected by CVE-2019-17055?

CVE-2019-17055 affects Linux kernel versions up to 5.3.2 and various distributions, including Red Hat, Debian, and Ubuntu.

4

Is CVE-2019-17055 exploitable remotely?

CVE-2019-17055 is not considered remotely exploitable as it requires local access to the system.

5

What is the impact of CVE-2019-17055?

The impact of CVE-2019-17055 allows unprivileged users to create raw sockets, which could facilitate further attacks on the system.

Company

Resources

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