==========================================================================
Ubuntu Security Notice USN-6185-1
June 22, 2023

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

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

- Ubuntu 20.04 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-raspi: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the TUN/TAP driver in the Linux kernel did not
properly initialize socket data. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-1076)

It was discovered that the Real-Time Scheduling Class implementation in the
Linux kernel contained a type confusion vulnerability in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-1077)

It was discovered that the ASUS HID driver in the Linux kernel did not
properly handle device removal, leading to a use-after-free vulnerability.
A local attacker with physical access could plug in a specially crafted USB
device to cause a denial of service (system crash). (CVE-2023-1079)

It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not properly handle device removal events. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2023-1670)

It was discovered that a race condition existed in the Xen transport layer
implementation for the 9P file system protocol in the Linux kernel, leading
to a use-after-free vulnerability. A local attacker could use this to cause
a denial of service (guest crash) or expose sensitive information (guest
kernel memory). (CVE-2023-1859)

Jose Oliveira and Rodrigo Branco discovered that the Spectre Variant 2
mitigations with prctl syscall were insufficient in some situations. A
local attacker could possibly use this to expose sensitive information.
(CVE-2023-1998)

It was discovered that the BigBen Interactive Kids' gamepad driver in the
Linux kernel did not properly handle device removal, leading to a use-
after-free vulnerability. A local attacker with physical access could plug
in a specially crafted USB device to cause a denial of service (system
crash). (CVE-2023-25012)

It was discovered that a use-after-free vulnerability existed in the HFS+
file system implementation in the Linux kernel. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2023-2985)

Update instructions:

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1051-ibm      5.4.0-1051.56
   linux-image-5.4.0-1065-bluefield  5.4.0-1065.71
   linux-image-5.4.0-1071-gkeop    5.4.0-1071.75
   linux-image-5.4.0-1088-raspi    5.4.0-1088.99
   linux-image-5.4.0-1093-kvm      5.4.0-1093.99
   linux-image-5.4.0-1102-gke      5.4.0-1102.109
   linux-image-5.4.0-1103-oracle   5.4.0-1103.112
   linux-image-5.4.0-1104-aws      5.4.0-1104.112
   linux-image-5.4.0-1107-gcp      5.4.0-1107.116
   linux-image-5.4.0-1110-azure    5.4.0-1110.116
   linux-image-aws-lts-20.04       5.4.0.1104.101
   linux-image-azure-lts-20.04     5.4.0.1110.103
   linux-image-bluefield           5.4.0.1065.60
   linux-image-gcp-lts-20.04       5.4.0.1107.109
   linux-image-gke                 5.4.0.1102.107
   linux-image-gke-5.4             5.4.0.1102.107
   linux-image-gkeop               5.4.0.1071.69
   linux-image-gkeop-5.4           5.4.0.1071.69
   linux-image-ibm                 5.4.0.1051.77
   linux-image-ibm-lts-20.04       5.4.0.1051.77
   linux-image-kvm                 5.4.0.1093.88
   linux-image-oracle-lts-20.04    5.4.0.1103.96
   linux-image-raspi               5.4.0.1088.118
   linux-image-raspi2              5.4.0.1088.118

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-6185-1
   CVE-2023-1076, CVE-2023-1077, CVE-2023-1079, CVE-2023-1670,
   CVE-2023-1859, CVE-2023-1998, CVE-2023-25012, CVE-2023-2985

Package Information:
   https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1104.112
   https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1110.116
   https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1065.71
   https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1107.116
   https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1102.109
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1071.75
   https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1051.56
   https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1093.99
   https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1103.112
   https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1088.99