CVE-2020-25284: Medium severity Linux Linux kernel vulnerability

Published Sep 13, 2020
·
Updated

A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add or remove Rados Block Devices from the system.

Other sources

The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe.

The rbd block device driver in drivers/block/rbd.c in the Linux kernel used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices.

References: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a

— Red Hat

Affected Software

80 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-305.rt7.72.el8
0:4.18.0-305.rt7.72.el8
redhat/kernel<0:4.18.0-305.el8
0:4.18.0-305.el8
Linux Linux kernel<5.8.9
Debian Debian Linux=9.0
openSUSE Leap=15.1
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1
ubuntu/linux-aws<4.4.0-1082.86
4.4.0-1082.86
ubuntu/linux-azure<4.15.0-1100.111~14.04.1
4.15.0-1100.111~14.04.1
ubuntu/linux-lts-xenial<4.4.0-197.229~14.04.1
4.4.0-197.229~14.04.1
ubuntu/linux*
ubuntu/linux<4.4.0-197.229
4.4.0-197.229
ubuntu/linux-aws<4.4.0-1118.132
4.4.0-1118.132
ubuntu/linux-aws-hwe<4.15.0-1088.93~16.04.1
4.15.0-1088.93~16.04.1
ubuntu/linux-azure<4.15.0-1100.111~16.04.1
4.15.0-1100.111~16.04.1
ubuntu/linux-gcp<4.15.0-1088.101~16.04.1
4.15.0-1088.101~16.04.1
ubuntu/linux-hwe<4.15.0-126.129~16.04.1
4.15.0-126.129~16.04.1
ubuntu/linux-kvm<4.4.0-1084.93
4.4.0-1084.93
ubuntu/linux-oracle<4.15.0-1059.65~16.04.1
4.15.0-1059.65~16.04.1
ubuntu/linux-raspi2<4.4.0-1142.152
4.4.0-1142.152
ubuntu/linux-snapdragon<4.4.0-1146.156
4.4.0-1146.156
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1051.57
4.4.0-1051.57
ubuntu/linux-fips*
ubuntu/linux<4.15.0-126.129
4.15.0-126.129
ubuntu/linux-aws<4.15.0-1088.93
4.15.0-1088.93
ubuntu/linux-aws-5.4<5.4.0-1030.31~18.04.1
5.4.0-1030.31~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1100.111
4.15.0-1100.111
ubuntu/linux-azure-5.4<5.4.0-1032.33~18.04.1
5.4.0-1032.33~18.04.1
ubuntu/linux-dell300x<4.15.0-1007.11
4.15.0-1007.11
ubuntu/linux-gcp-4.15<4.15.0-1088.101
4.15.0-1088.101
ubuntu/linux-gcp-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-gke-4.15<4.15.0-1074.79
4.15.0-1074.79
ubuntu/linux-gke-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1005.6
5.4.0-1005.6
ubuntu/linux-hwe-5.4<5.4.0-56.62~18.04.1
5.4.0-56.62~18.04.1
ubuntu/linux-kvm<4.15.0-1079.81
4.15.0-1079.81
ubuntu/linux-oem<4.15.0-1103.114
4.15.0-1103.114
ubuntu/linux-oracle<4.15.0-1059.65
4.15.0-1059.65
ubuntu/linux-oracle-5.4<5.4.0-1030.32~18.04.1
5.4.0-1030.32~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1023.26~18.04.1
5.4.0-1023.26~18.04.1
ubuntu/linux-raspi2<4.15.0-1074.79
4.15.0-1074.79
ubuntu/linux-snapdragon<4.15.0-1091.100
4.15.0-1091.100
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-edge*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2031.32
4.15.0-2031.32
ubuntu/linux-azure-fips<4.15.0-2013.15
4.15.0-2013.15
ubuntu/linux-fips<4.15.0-1046.53
4.15.0-1046.53
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-56.62
5.4.0-56.62
ubuntu/linux-aws<5.4.0-1030.31
5.4.0-1030.31
ubuntu/linux-azure<5.4.0-1032.33
5.4.0-1032.33
ubuntu/linux-gcp<5.4.0-1030.32
5.4.0-1030.32
ubuntu/linux-kvm<5.4.0-1028.29
5.4.0-1028.29
ubuntu/linux-oem-5.6<5.6.0-1048.52
5.6.0-1048.52
ubuntu/linux-oracle<5.4.0-1030.32
5.4.0-1030.32
ubuntu/linux-raspi<5.4.0-1023.26
5.4.0-1023.26
ubuntu/linux-riscv<5.4.0-37.42
5.4.0-37.42
ubuntu/linux-raspi2*
ubuntu/linux-aws-fips<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
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 0:4.18.0-305.rt7.72.el8
  2. Upgrade

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

    Fixed in 0:4.18.0-305.el8
  3. Upgrade

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

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
  4. Upgrade

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

    Fixed in 4.4.0-1082.86
  5. Upgrade

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

    Fixed in 4.15.0-1100.111~14.04.1
  6. Upgrade

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

    Fixed in 4.4.0-197.229~14.04.1
  7. Upgrade

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

    Fixed in 4.4.0-197.229
  8. Upgrade

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

    Fixed in 4.4.0-1118.132
  9. Upgrade

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

    Fixed in 4.15.0-1088.93~16.04.1
  10. Upgrade

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

    Fixed in 4.15.0-1100.111~16.04.1
  11. Upgrade

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

    Fixed in 4.15.0-1088.101~16.04.1
  12. Upgrade

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

    Fixed in 4.15.0-126.129~16.04.1
  13. Upgrade

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

    Fixed in 4.4.0-1084.93
  14. Upgrade

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

    Fixed in 4.15.0-1059.65~16.04.1
  15. Upgrade

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

    Fixed in 4.4.0-1142.152
  16. Upgrade

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

    Fixed in 4.4.0-1146.156
  17. Upgrade

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

    Fixed in 4.4.0-1051.57
  18. Upgrade

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

    Fixed in 4.15.0-126.129
  19. Upgrade

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

    Fixed in 4.15.0-1088.93
  20. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.31~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1100.111
  22. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.33~18.04.1
  23. Upgrade

    Upgrade ubuntu/linux-dell300x to a version that resolves this vulnerability.

    Fixed in 4.15.0-1007.11
  24. Upgrade

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

    Fixed in 4.15.0-1088.101
  25. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  26. Upgrade

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

    Fixed in 4.15.0-1074.79
  27. Upgrade

    Upgrade ubuntu/linux-gke-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  28. Upgrade

    Upgrade ubuntu/linux-gkeop-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1005.6
  29. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-56.62~18.04.1
  30. Upgrade

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

    Fixed in 4.15.0-1079.81
  31. Upgrade

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

    Fixed in 4.15.0-1103.114
  32. Upgrade

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

    Fixed in 4.15.0-1059.65
  33. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.32~18.04.1
  34. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1023.26~18.04.1
  35. Upgrade

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

    Fixed in 4.15.0-1074.79
  36. Upgrade

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

    Fixed in 4.15.0-1091.100
  37. Upgrade

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

    Fixed in 4.15.0-2031.32
  38. Upgrade

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

    Fixed in 4.15.0-2013.15
  39. Upgrade

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

    Fixed in 4.15.0-1046.53
  40. Upgrade

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

    Fixed in 5.4.0-56.62
  41. Upgrade

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

    Fixed in 5.4.0-1030.31
  42. Upgrade

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

    Fixed in 5.4.0-1032.33
  43. Upgrade

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

    Fixed in 5.4.0-1030.32
  44. Upgrade

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

    Fixed in 5.4.0-1028.29
  45. Upgrade

    Upgrade ubuntu/linux-oem-5.6 to a version that resolves this vulnerability.

    Fixed in 5.6.0-1048.52
  46. Upgrade

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

    Fixed in 5.4.0-1030.32
  47. Upgrade

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

    Fixed in 5.4.0-1023.26
  48. Upgrade

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

    Fixed in 5.4.0-37.42
  49. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  50. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  51. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  52. Configuration

    Add `install rbd /bin/true` to `/etc/modprobe.d/disable-rdb.conf` to prevent the rbd module from loading.

    Linux kernel rbd module install rbd = /bin/true
  53. Operational

    Restart the system if the rbd module is already loaded.

Event History

Sep 13, 2020
CVE Published
12:00 AM
CVE Published
via MITRE·05:28 PM
Data Sourced
via MITRE·05:28 PM
Description
Data Sourced
via OSV·06:15 PM
DescriptionSeverityAffected Software
Sep 25, 2020
Data Sourced
via Red Hat·04:45 AM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2020-25284?

CVE-2020-25284 has been classified as having a high severity level due to its potential to allow unauthorized manipulation of Rados Block Devices.

2

How do I fix CVE-2020-25284?

To mitigate CVE-2020-25284, upgrade to the specific patched versions of the kernel packages as provided by your Linux distribution.

3

Who is affected by CVE-2020-25284?

Users running vulnerable versions of the Linux kernel or specific distributions like Red Hat, Debian, or openSUSE are affected by CVE-2020-25284.

4

What are the impacted Linux kernel versions in CVE-2020-25284?

CVE-2020-25284 affects Linux kernel versions prior to 5.8.9 as well as specific packaged versions in various distributions.

5

Can CVE-2020-25284 be exploited remotely?

CVE-2020-25284 requires local root privileges for exploitation, therefore it cannot be exploited remotely.

Company

Resources

Contact

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