USN-5577-1: Linux kernel (OEM) vulnerabilities

Published Aug 24, 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 framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, 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-2021-33655)

Affected Software

9 affected componentsFixes available
Linux Kernel
All of the following
ubuntu/linux-image-oem-20.04c<5.14.0.1049.45
5.14.0.1049.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-20.04b<5.14.0.1049.45
5.14.0.1049.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-20.04<5.14.0.1049.45
5.14.0.1049.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.14.0-1049-oem<5.14.0-1049.56
5.14.0-1049.56
Ubuntu Ubuntu=20.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.14.0.1049.45
  2. Upgrade

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

    Fixed in 5.14.0.1049.45
  3. Upgrade

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

    Fixed in 5.14.0.1049.45
  4. Upgrade

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

    Fixed in 5.14.0.1049.45
  5. Upgrade

    Upgrade ubuntu/linux-image-5.14.0-1049-oem to a version that resolves this vulnerability.

    Fixed in 5.14.0-1049.56

Event History

Aug 24, 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 can a local attacker exploit CVE-2021-33061?

A local attacker could exploit CVE-2021-33061 by performing insufficient control flow management in the Intel 10GbE PCI Express (ixgbe) Ethernet driver for the Linux kernel, potentially causing a denial of service.

4

Which versions of Linux are affected by this vulnerability?

The affected versions of Linux are Ubuntu 20.04 with the linux-image-oem-20.04c, linux-image-oem-20.04b, linux-image-oem-20.04d, and linux-image-oem-20.04 packages, as well as Ubuntu 20.04 with the linux-image-5.14.0-1049-oem package.

5

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

To fix the vulnerability (CVE-2021-33061), update the affected Linux packages to version 5.14.0.1049.45 or later.

Company

Resources

Contact

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