USN-5600-1: Linux kernel (HWE) vulnerabilities

Published Sep 5, 2022
·
Updated

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe) Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. (CVE-2021-33061) It was discovered that the virtual terminal driver in the Linux kernel did not properly handle VGA console font changes, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33656)

Affected Software

20 affected componentsFixes available
All of the following
ubuntu/linux-image-snapdragon-hwe-18.04<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-hwe-18.04<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-virtual-hwe-18.04<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-oem<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-oem-osp1<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-125-generic-lpae<5.4.0-125.141~18.04.1
5.4.0-125.141~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-18.04<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-125-generic<5.4.0-125.141~18.04.1
5.4.0-125.141~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-lowlatency-hwe-18.04<5.4.0.125.141~18.04.105
5.4.0.125.141~18.04.105
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-125-lowlatency<5.4.0-125.141~18.04.1
5.4.0-125.141~18.04.1
Ubuntu Ubuntu=18.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  2. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  3. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  4. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  5. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  6. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-125-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.4.0-125.141~18.04.1
  7. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  8. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-125-generic to a version that resolves this vulnerability.

    Fixed in 5.4.0-125.141~18.04.1
  9. Upgrade

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

    Fixed in 5.4.0.125.141~18.04.105
  10. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-125-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.4.0-125.141~18.04.1

Event History

Sep 5, 2022
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 vulnerability ID for this advisory?

The vulnerability ID for this advisory is CVE-2021-33061.

2

What is the severity of CVE-2021-33061?

The severity of CVE-2021-33061 is not specified in the advisory.

3

How does CVE-2021-33061 impact Linux kernel (HWE)?

CVE-2021-33061 could allow a local attacker to cause a denial of service on Linux kernel (HWE) through insufficient control flow management in the Intel(R) 10GbE PCI Express (ixgbe) Ethernet driver.

4

How can I fix the vulnerability CVE-2021-33061?

To fix the vulnerability CVE-2021-33061, update your Ubuntu system to the remedied version 5.4.0.125.141~18.04.105 or later for the Linux kernel package specified in the advisory.

5

Where can I find more information about CVE-2021-33061?

More information about CVE-2021-33061 can be found on the Ubuntu security website at the following link: [CVE-2021-33061](https://ubuntu.com/security/CVE-2021-33061)

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