==========================================================================
Ubuntu Security Notice USN-5467-1
June 08, 2022

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4,
linux-azure-fde, linux-gcp, linux-gke, linux-gke-5.4, linux-gkeop,
linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm,
linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-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: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fde: Linux kernel for Microsoft Azure cloud systems
- 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-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop-5.4: Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the Linux kernel did not properly restrict access to
the kernel debugger when booted in secure boot environments. A privileged
attacker could use this to bypass UEFI Secure Boot restrictions.
(CVE-2022-21499)

Aaron Adams discovered that the netfilter subsystem in the Linux kernel did
not properly handle the removal of stateful expressions in some situations,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-1966)

It was discovered that the SCTP protocol implementation in the Linux kernel
did not properly verify VTAGs in some situations. A remote attacker could
possibly use this to cause a denial of service (connection disassociation).
(CVE-2021-3772)

Eric Biederman discovered that the cgroup process migration implementation
in the Linux kernel did not perform permission checks correctly in some
situations. A local attacker could possibly use this to gain administrative
privileges. (CVE-2021-4197)

Jann Horn discovered that the FUSE file system in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2022-1011)

Qiuhao Li, Gaoning Pan and Yongkang Jia discovered that the KVM
implementation in the Linux kernel did not properly perform guest page
table updates in some situations. An attacker in a guest vm could possibly
use this to crash the host OS. (CVE-2022-1158)

Duoming Zhou discovered that the 6pack protocol implementation in the Linux
kernel did not handle detach events properly in some situations, leading to
a use-after-free vulnerability. A local attacker could use this to cause a
denial of service (system crash). (CVE-2022-1198)

It was discovered that the PF_KEYv2 implementation in the Linux kernel did
not properly initialize kernel memory in some situations. A local attacker
could use this to expose sensitive information (kernel memory).
(CVE-2022-1353)

It was discovered that the implementation of X.25 network protocols in the
Linux kernel did not terminate link layer sessions properly. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2022-1516)

Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23036, CVE-2022-23037, CVE-2022-23038,
CVE-2022-23039, CVE-2022-23040, CVE-2022-23041, CVE-2022-23042)

It was discovered that the USB Gadget file system interface in the Linux
kernel contained a use-after-free vulnerability. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2022-24958)

It was discovered that the USB SR9700 ethernet device driver for the Linux
kernel did not properly validate the length of requests from the device. A
physically proximate attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-26966)

赵子轩 discovered that the 802.2 LLC type 2 driver in the Linux kernel did not
properly perform reference counting in some error conditions. A local
attacker could use this to cause a denial of service. (CVE-2022-28356)

It was discovered that the Microchip CAN BUS Analyzer interface
implementation in the Linux kernel did not properly handle certain error
conditions, leading to a double-free. A local attacker could possibly use
this to cause a denial of service (system crash). (CVE-2022-28389)

It was discovered that the EMS CAN/USB interface implementation in the
Linux kernel contained a double-free vulnerability when handling certain
error conditions. A local attacker could use this to cause a denial of
service (memory exhaustion). (CVE-2022-28390)

Update instructions:

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1026-ibm      5.4.0-1026.29
  linux-image-5.4.0-1046-gkeop    5.4.0-1046.48
  linux-image-5.4.0-1065-raspi    5.4.0-1065.75
  linux-image-5.4.0-1068-kvm      5.4.0-1068.72
  linux-image-5.4.0-1074-gke      5.4.0-1074.79
  linux-image-5.4.0-1076-oracle   5.4.0-1076.83
  linux-image-5.4.0-1078-aws      5.4.0-1078.84
  linux-image-5.4.0-1078-gcp      5.4.0-1078.84
  linux-image-5.4.0-1083-azure    5.4.0-1083.87
  linux-image-5.4.0-1083-azure-fde  5.4.0-1083.87+cvm1.1
  linux-image-5.4.0-117-generic   5.4.0-117.132
  linux-image-5.4.0-117-generic-lpae  5.4.0-117.132
  linux-image-5.4.0-117-lowlatency  5.4.0-117.132
  linux-image-aws-lts-20.04       5.4.0.1078.79
  linux-image-azure-fde           5.4.0.1083.87+cvm1.24
  linux-image-azure-lts-20.04     5.4.0.1083.81
  linux-image-gcp-lts-20.04       5.4.0.1078.85
  linux-image-generic             5.4.0.117.120
  linux-image-generic-lpae        5.4.0.117.120
  linux-image-gke                 5.4.0.1074.83
  linux-image-gke-5.4             5.4.0.1074.83
  linux-image-gkeop               5.4.0.1046.48
  linux-image-gkeop-5.4           5.4.0.1046.48
  linux-image-ibm                 5.4.0.1026.24
  linux-image-ibm-lts-20.04       5.4.0.1026.24
  linux-image-kvm                 5.4.0.1068.66
  linux-image-lowlatency          5.4.0.117.120
  linux-image-oem                 5.4.0.117.120
  linux-image-oem-osp1            5.4.0.117.120
  linux-image-oracle-lts-20.04    5.4.0.1076.75
  linux-image-raspi               5.4.0.1065.98
  linux-image-raspi2              5.4.0.1065.98
  linux-image-virtual             5.4.0.117.120

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1026-ibm      5.4.0-1026.29~18.04.1
  linux-image-5.4.0-1046-gkeop    5.4.0-1046.48~18.04.1
  linux-image-5.4.0-1065-raspi    5.4.0-1065.75~18.04.1
  linux-image-5.4.0-1074-gke      5.4.0-1074.79~18.04.1
  linux-image-5.4.0-1076-oracle   5.4.0-1076.83~18.04.1
  linux-image-5.4.0-1078-aws      5.4.0-1078.84~18.04.1
  linux-image-5.4.0-1083-azure    5.4.0-1083.87~18.04.1
  linux-image-5.4.0-117-generic   5.4.0-117.132~18.04.1
  linux-image-5.4.0-117-generic-lpae  5.4.0-117.132~18.04.1
  linux-image-5.4.0-117-lowlatency  5.4.0-117.132~18.04.1
  linux-image-aws                 5.4.0.1078.59
  linux-image-azure               5.4.0.1083.61
  linux-image-generic-hwe-18.04   5.4.0.117.132~18.04.99
  linux-image-generic-lpae-hwe-18.04  5.4.0.117.132~18.04.99
  linux-image-gke-5.4             5.4.0.1074.79~18.04.37
  linux-image-gkeop-5.4           5.4.0.1046.48~18.04.44
  linux-image-ibm                 5.4.0.1026.41
  linux-image-lowlatency-hwe-18.04  5.4.0.117.132~18.04.99
  linux-image-oem                 5.4.0.117.132~18.04.99
  linux-image-oem-osp1            5.4.0.117.132~18.04.99
  linux-image-oracle              5.4.0.1076.83~18.04.54
  linux-image-raspi-hwe-18.04     5.4.0.1065.65
  linux-image-snapdragon-hwe-18.04  5.4.0.117.132~18.04.99
  linux-image-virtual-hwe-18.04   5.4.0.117.132~18.04.99

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-5467-1
  CVE-2021-3772, CVE-2021-4197, CVE-2022-1011, CVE-2022-1158,
  CVE-2022-1198, CVE-2022-1353, CVE-2022-1516, CVE-2022-1966,
  CVE-2022-21499, CVE-2022-23036, CVE-2022-23037, CVE-2022-23038,
  CVE-2022-23039, CVE-2022-23040, CVE-2022-23041, CVE-2022-23042,
  CVE-2022-24958, CVE-2022-26966, CVE-2022-28356, CVE-2022-28389,
  CVE-2022-28390

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-117.132
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1078.84
  https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1083.87
  https://launchpad.net/ubuntu/+source/linux-azure-fde/5.4.0-1083.87+cvm1.1
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1078.84
  https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1074.79
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1046.48
  https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1026.29
  https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1068.72
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1076.83
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1065.75
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1078.84~18.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1083.87~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1074.79~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1046.48~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-117.132~18.04.1
  https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1026.29~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1076.83~18.04.1
  https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1065.75~18.04.1