USN-4879-1: Linux kernel vulnerabilities

Published Mar 16, 2021
·
Updated

It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-36158) Loris Reiff discovered that the BPF implementation in the Linux kernel did not properly validate attributes in the getsockopt BPF hook. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-20194)

Affected Software

68 affected componentsFixes available
All of the following
ubuntu/linux-image-5.8.0-1017-raspi<5.8.0-1017.20
5.8.0-1017.20
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1017-raspi-nolpae<5.8.0-1017.20
5.8.0-1017.20
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1020-kvm<5.8.0-1020.22
5.8.0-1020.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1022-oracle<5.8.0-1022.23
5.8.0-1022.23
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1024-azure<5.8.0-1024.26
5.8.0-1024.26
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1024-gcp<5.8.0-1024.25
5.8.0-1024.25
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1025-aws<5.8.0-1025.27
5.8.0-1025.27
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-45-generic<5.8.0-45.51
5.8.0-45.51
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-45-generic-64k<5.8.0-45.51
5.8.0-45.51
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-45-generic-lpae<5.8.0-45.51
5.8.0-45.51
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-45-lowlatency<5.8.0-45.51
5.8.0-45.51
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-aws<5.8.0.1025.27
5.8.0.1025.27
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-azure<5.8.0.1024.24
5.8.0.1024.24
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gcp<5.8.0.1024.24
5.8.0.1024.24
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-64k<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-lpae<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gke<5.8.0.1024.24
5.8.0.1024.24
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-kvm<5.8.0.1020.22
5.8.0.1020.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-lowlatency<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oem-20.04<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oracle<5.8.0.1022.21
5.8.0.1022.21
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi<5.8.0.1017.20
5.8.0.1017.20
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi-nolpae<5.8.0.1017.20
5.8.0.1017.20
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-virtual<5.8.0.45.50
5.8.0.45.50
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-45-generic<5.8.0-45.51~20.04.1
5.8.0-45.51~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-45-generic-64k<5.8.0-45.51~20.04.1
5.8.0-45.51~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-45-generic-lpae<5.8.0-45.51~20.04.1
5.8.0-45.51~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-45-lowlatency<5.8.0-45.51~20.04.1
5.8.0-45.51~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-64k-hwe-20.04<5.8.0.45.51~20.04.31
5.8.0.45.51~20.04.31
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-hwe-20.04<5.8.0.45.51~20.04.31
5.8.0.45.51~20.04.31
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-20.04<5.8.0.45.51~20.04.31
5.8.0.45.51~20.04.31
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency-hwe-20.04<5.8.0.45.51~20.04.31
5.8.0.45.51~20.04.31
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-virtual-hwe-20.04<5.8.0.45.51~20.04.31
5.8.0.45.51~20.04.31
Ubuntu Ubuntu=20.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1017-raspi to a version that resolves this vulnerability.

    Fixed in 5.8.0-1017.20
  2. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1017-raspi-nolpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-1017.20
  3. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1020-kvm to a version that resolves this vulnerability.

    Fixed in 5.8.0-1020.22
  4. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1022-oracle to a version that resolves this vulnerability.

    Fixed in 5.8.0-1022.23
  5. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1024-azure to a version that resolves this vulnerability.

    Fixed in 5.8.0-1024.26
  6. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1024-gcp to a version that resolves this vulnerability.

    Fixed in 5.8.0-1024.25
  7. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1025-aws to a version that resolves this vulnerability.

    Fixed in 5.8.0-1025.27
  8. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51
  9. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51
  10. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51
  11. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51
  12. Upgrade

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

    Fixed in 5.8.0.1025.27
  13. Upgrade

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

    Fixed in 5.8.0.1024.24
  14. Upgrade

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

    Fixed in 5.8.0.1024.24
  15. Upgrade

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

    Fixed in 5.8.0.45.50
  16. Upgrade

    Upgrade ubuntu/linux-image-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.50
  17. Upgrade

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

    Fixed in 5.8.0.45.50
  18. Upgrade

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

    Fixed in 5.8.0.1024.24
  19. Upgrade

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

    Fixed in 5.8.0.1020.22
  20. Upgrade

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

    Fixed in 5.8.0.45.50
  21. Upgrade

    Upgrade ubuntu/linux-image-oem-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.50
  22. Upgrade

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

    Fixed in 5.8.0.1022.21
  23. Upgrade

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

    Fixed in 5.8.0.1017.20
  24. Upgrade

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

    Fixed in 5.8.0.1017.20
  25. Upgrade

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

    Fixed in 5.8.0.45.50
  26. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51~20.04.1
  27. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51~20.04.1
  28. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51~20.04.1
  29. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-45-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-45.51~20.04.1
  30. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.51~20.04.31
  31. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.51~20.04.31
  32. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.51~20.04.31
  33. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.51~20.04.31
  34. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.45.51~20.04.31

Event History

Mar 16, 2021
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-4879-1?

The severity of USN-4879-1 is classified as potentially critical, as it allows local attackers to cause denial of service or potentially execute arbitrary code.

2

How do I fix USN-4879-1?

To fix USN-4879-1, ensure you update to the recommended kernel versions, such as linux-image-5.8.0-1017.20 or later.

3

What systems are affected by USN-4879-1?

USN-4879-1 affects Ubuntu 20.10 systems using the specific versions of the Linux kernel mentioned in this advisory.

4

What vulnerabilities are addressed by USN-4879-1?

USN-4879-1 addresses vulnerabilities including CVE-2020-36158, which involves improper validation in the Marvell WiFi-Ex device driver.

5

Can USN-4879-1 lead to system crashes?

Yes, USN-4879-1 can lead to system crashes if exploited due to the denial of service vulnerabilities present in certain device drivers.

Company

Resources

Contact

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