Ubuntu 6287 Published by

A Linux kernel security update has been released for Ubuntu Linux 22.04 LTS.



[USN-6260-1] Linux kernel vulnerabilities


==========================================================================
Ubuntu Security Notice USN-6260-1
July 27, 2023

linux-aws-5.19, linux-gcp-5.19, linux-hwe-5.19 vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws-5.19: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.19: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.19: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the NTFS file system implementation in the Linux
kernel did not properly check buffer indexes in certain situations, leading
to an out-of-bounds read vulnerability. A local attacker could possibly use
this to expose sensitive information (kernel memory). (CVE-2022-48502)

Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS
implementation in the Ubuntu Linux kernel did not properly perform
permission checks in certain situations. A local attacker could possibly
use this to gain elevated privileges. (CVE-2023-2640)

It was discovered that the IP-VLAN network driver for the Linux kernel did
not properly initialize memory in some situations, leading to an out-of-
bounds write vulnerability. An attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2023-3090)

Mingi Cho discovered that the netfilter subsystem in the Linux kernel did
not properly validate the status of a nft chain while performing a lookup
by id, leading to a use-after-free vulnerability. An attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2023-31248)

It was discovered that the Ricoh R5C592 MemoryStick card reader driver in
the Linux kernel contained a race condition during module unload, leading
to 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-2023-3141)

Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in
the Ubuntu Linux kernel did not properly perform permission checks in
certain situations. A local attacker could possibly use this to gain
elevated privileges. (CVE-2023-32629)

Querijn Voet discovered that a race condition existed in the io_uring
subsystem in the Linux kernel, leading to 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-2023-3389)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle some error conditions, leading to 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-2023-3390)

Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel
did not properly handle certain pointer data type, leading to an out-of-
bounds write vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35001)

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.19.0-1029-aws 5.19.0-1029.30~22.04.1
linux-image-5.19.0-1030-gcp 5.19.0-1030.32~22.04.1
linux-image-5.19.0-50-generic 5.19.0-50.50
linux-image-5.19.0-50-generic-64k 5.19.0-50.50
linux-image-5.19.0-50-generic-lpae 5.19.0-50.50
linux-image-aws 5.19.0.1029.30~22.04.13
linux-image-gcp 5.19.0.1030.32~22.04.2
linux-image-generic-64k-hwe-22.04 5.19.0.50.22
linux-image-generic-hwe-22.04 5.19.0.50.22
linux-image-generic-lpae-hwe-22.04 5.19.0.50.22
linux-image-virtual-hwe-22.04 5.19.0.50.22

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-6260-1
CVE-2022-48502, CVE-2023-2640, CVE-2023-3090, CVE-2023-31248,
CVE-2023-3141, CVE-2023-32629, CVE-2023-3389, CVE-2023-3390,
CVE-2023-35001

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws-5.19/5.19.0-1029.30~22.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.19/5.19.0-1030.32~22.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-50.50