[USN-5592-1] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-5592-1
September 01, 2022

linux-aws, linux-azure, linux-bluefield, linux-gcp, linux-gcp-5.4,
linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle,
linux-oracle-5.4 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1032-ibm      5.4.0-1032.36
   linux-image-5.4.0-1045-bluefield  5.4.0-1045.50
   linux-image-5.4.0-1052-gkeop    5.4.0-1052.55
   linux-image-5.4.0-1074-kvm      5.4.0-1074.79
   linux-image-5.4.0-1081-gke      5.4.0-1081.87
   linux-image-5.4.0-1082-oracle   5.4.0-1082.90
   linux-image-5.4.0-1084-aws      5.4.0-1084.91
   linux-image-5.4.0-1087-gcp      5.4.0-1087.95
   linux-image-5.4.0-1090-azure    5.4.0-1090.95
   linux-image-aws-lts-20.04       5.4.0.1084.84
   linux-image-azure-lts-20.04     5.4.0.1090.87
   linux-image-bluefield           5.4.0.1045.44
   linux-image-gcp-lts-20.04       5.4.0.1087.92
   linux-image-gke                 5.4.0.1081.89
   linux-image-gke-5.4             5.4.0.1081.89
   linux-image-gkeop               5.4.0.1052.53
   linux-image-gkeop-5.4           5.4.0.1052.53
   linux-image-ibm                 5.4.0.1032.61
   linux-image-ibm-lts-20.04       5.4.0.1032.61
   linux-image-kvm                 5.4.0.1074.71
   linux-image-oracle-lts-20.04    5.4.0.1082.79

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1032-ibm      5.4.0-1032.36~18.04.1
   linux-image-5.4.0-1082-oracle   5.4.0-1082.90~18.04.1
   linux-image-5.4.0-1087-gcp      5.4.0-1087.95~18.04.1
   linux-image-gcp                 5.4.0.1087.66
   linux-image-ibm                 5.4.0.1032.46
   linux-image-oracle              5.4.0.1082.90~18.04.59

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
   https://ubuntu.com/security/notices/USN-5592-1
   CVE-2021-33061, CVE-2021-33656

Package Information:
   https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1084.91
   https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1090.95
   https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1045.50
   https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1087.95
   https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1081.87
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1052.55
   https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1032.36
   https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1074.79
   https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1082.90
   https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1087.95~18.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1032.36~18.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1082.90~18.04.1
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