USN-4300-1: Linux kernel vulnerabilities

Published Mar 25, 2020
·
Updated

It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information (read memory from another guest VM). (CVE-2019-3016) Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. (CVE-2020-2732) It was discovered that the Afatech AF9005 DVB-T USB device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-18809) It was discovered that the Intel(R) XL710 Ethernet Controller device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19043) It was discovered that the RPMSG character device interface in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19053) It was discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to possibly cause a denial of service (kernel memory exhaustion). (CVE-2019-19056) It was discovered that the Intel(R) Wi-Fi device driver in the Linux kernel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19058, CVE-2019-19059) It was discovered that the Serial Peripheral Interface (SPI) driver in the Linux kernel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19064) It was discovered that the Brocade BFA Fibre Channel device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19066) It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19068)

Affected Software

77 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-5.3.0-1011-oracle<5.3.0-1011.12
5.3.0-1011.12
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1012-kvm<5.3.0-1012.13
5.3.0-1012.13
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1013-aws<5.3.0-1013.14
5.3.0-1013.14
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1014-gcp<5.3.0-1014.15
5.3.0-1014.15
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1016-azure<5.3.0-1016.17
5.3.0-1016.17
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1019-raspi2<5.3.0-1019.21
5.3.0-1019.21
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-42-generic<5.3.0-42.34
5.3.0-42.34
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-42-generic-lpae<5.3.0-42.34
5.3.0-42.34
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-42-lowlatency<5.3.0-42.34
5.3.0-42.34
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-42-snapdragon<5.3.0-42.34
5.3.0-42.34
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-aws<5.3.0.1013.15
5.3.0.1013.15
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-azure<5.3.0.1016.35
5.3.0.1016.35
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-gcp<5.3.0.1014.15
5.3.0.1014.15
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-generic<5.3.0.42.36
5.3.0.42.36
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-generic-lpae<5.3.0.42.36
5.3.0.42.36
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-gke<5.3.0.1014.15
5.3.0.1014.15
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-kvm<5.3.0.1012.14
5.3.0.1012.14
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-lowlatency<5.3.0.42.36
5.3.0.42.36
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-oracle<5.3.0.1011.12
5.3.0.1011.12
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-raspi2<5.3.0.1019.16
5.3.0.1019.16
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-snapdragon<5.3.0.42.36
5.3.0.42.36
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-virtual<5.3.0.42.36
5.3.0.42.36
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-1014-gcp<5.3.0-1014.15~18.04.1
5.3.0-1014.15~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-1014-gke<5.3.0-1014.15~18.04.1
5.3.0-1014.15~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-1016-azure<5.3.0-1016.17~18.04.1
5.3.0-1016.17~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-1019-raspi2<5.3.0-1019.21~18.04.1
5.3.0-1019.21~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-42-generic<5.3.0-42.34~18.04.1
5.3.0-42.34~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-42-generic-lpae<5.3.0-42.34~18.04.1
5.3.0-42.34~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-42-lowlatency<5.3.0-42.34~18.04.1
5.3.0-42.34~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-azure-edge<5.3.0.1016.16
5.3.0.1016.16
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gcp-edge<5.3.0.1014.13
5.3.0.1014.13
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-hwe-18.04<5.3.0.42.99
5.3.0.42.99
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-18.04<5.3.0.42.99
5.3.0.42.99
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gke-5.3<5.3.0.1014.4
5.3.0.1014.4
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-lowlatency-hwe-18.04<5.3.0.42.99
5.3.0.42.99
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-raspi2-hwe-18.04<5.3.0.1019.8
5.3.0.1019.8
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-snapdragon-hwe-18.04<5.3.0.42.99
5.3.0.42.99
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-virtual-hwe-18.04<5.3.0.42.99
5.3.0.42.99
Ubuntu Ubuntu=18.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1011-oracle to a version that resolves this vulnerability.

    Fixed in 5.3.0-1011.12
  2. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1012-kvm to a version that resolves this vulnerability.

    Fixed in 5.3.0-1012.13
  3. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1013-aws to a version that resolves this vulnerability.

    Fixed in 5.3.0-1013.14
  4. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1014-gcp to a version that resolves this vulnerability.

    Fixed in 5.3.0-1014.15
  5. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1016-azure to a version that resolves this vulnerability.

    Fixed in 5.3.0-1016.17
  6. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1019-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1019.21
  7. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-generic to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34
  8. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34
  9. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34
  10. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-snapdragon to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34
  11. Upgrade

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

    Fixed in 5.3.0.1013.15
  12. Upgrade

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

    Fixed in 5.3.0.1016.35
  13. Upgrade

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

    Fixed in 5.3.0.1014.15
  14. Upgrade

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

    Fixed in 5.3.0.42.36
  15. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.36
  16. Upgrade

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

    Fixed in 5.3.0.1014.15
  17. Upgrade

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

    Fixed in 5.3.0.1012.14
  18. Upgrade

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

    Fixed in 5.3.0.42.36
  19. Upgrade

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

    Fixed in 5.3.0.1011.12
  20. Upgrade

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

    Fixed in 5.3.0.1019.16
  21. Upgrade

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

    Fixed in 5.3.0.42.36
  22. Upgrade

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

    Fixed in 5.3.0.42.36
  23. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1014-gcp to a version that resolves this vulnerability.

    Fixed in 5.3.0-1014.15~18.04.1
  24. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1014-gke to a version that resolves this vulnerability.

    Fixed in 5.3.0-1014.15~18.04.1
  25. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1016-azure to a version that resolves this vulnerability.

    Fixed in 5.3.0-1016.17~18.04.1
  26. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1019-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1019.21~18.04.1
  27. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-generic to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34~18.04.1
  28. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34~18.04.1
  29. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-42-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.3.0-42.34~18.04.1
  30. Upgrade

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

    Fixed in 5.3.0.1016.16
  31. Upgrade

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

    Fixed in 5.3.0.1014.13
  32. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.99
  33. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.99
  34. Upgrade

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

    Fixed in 5.3.0.1014.4
  35. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.99
  36. Upgrade

    Upgrade ubuntu/linux-image-raspi2-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.1019.8
  37. Upgrade

    Upgrade ubuntu/linux-image-snapdragon-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.99
  38. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.42.99
  39. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Patch USN-4300-1

Event History

Mar 25, 2020
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-4300-1?

The severity of USN-4300-1 is classified as high due to potential exposure of sensitive information by attackers in guest virtual machines.

2

How do I fix USN-4300-1?

To fix USN-4300-1, you should upgrade to the recommended kernel versions as specified in the advisory.

3

Which versions of Ubuntu are affected by USN-4300-1?

Ubuntu 19.10 is affected by USN-4300-1, particularly various versions of the kernel packages listed in the advisory.

4

What type of vulnerability is described in USN-4300-1?

USN-4300-1 describes a vulnerability in the KVM implementation of the Linux kernel that affects paravirtual TLB flushes.

5

Can USN-4300-1 be exploited remotely?

Exploitation of USN-4300-1 requires an attacker to have access to a guest virtual machine on the host.

Company

Resources

Contact

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