[USN-6149-1] Linux kernel vulnerabilities
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Ubuntu Security Notice USN-6149-1
June 08, 2023
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)
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-kvm: Linux kernel for cloud environments
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
Details:
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
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-2023-32233)
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-1380)
It was discovered that the Human Interface Device (HID) support driver 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-2023-1073)
Wei Chen discovered that the DVB USB AZ6027 driver in the Linux kernel
contained a null pointer dereference when handling certain messages from
user space. A local attacker could use this to cause a denial of service
(system crash). (CVE-2023-28328)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
linux-image-4.4.0-1120-kvm 4.4.0-1120.130
linux-image-4.4.0-1157-aws 4.4.0-1157.172
linux-image-4.4.0-241-generic 4.4.0-241.275
linux-image-4.4.0-241-lowlatency 4.4.0-241.275
linux-image-aws 4.4.0.1157.161
linux-image-generic 4.4.0.241.247
linux-image-generic-lts-xenial 4.4.0.241.247
linux-image-kvm 4.4.0.1120.117
linux-image-lowlatency 4.4.0.241.247
linux-image-lowlatency-lts-xenial 4.4.0.241.247
linux-image-virtual 4.4.0.241.247
linux-image-virtual-lts-xenial 4.4.0.241.247
Ubuntu 14.04 LTS (Available with Ubuntu Pro):
linux-image-4.4.0-1119-aws 4.4.0-1119.125
linux-image-4.4.0-241-generic 4.4.0-241.275~14.04.1
linux-image-4.4.0-241-lowlatency 4.4.0-241.275~14.04.1
linux-image-aws 4.4.0.1119.116
linux-image-generic-lts-xenial 4.4.0.241.209
linux-image-lowlatency-lts-xenial 4.4.0.241.209
linux-image-virtual-lts-xenial 4.4.0.241.209
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-6149-1
CVE-2023-1073, CVE-2023-1380, CVE-2023-28328, CVE-2023-30456,
CVE-2023-31436, CVE-2023-32233
A Linux kernel security update has been released for Ubuntu Linux 14.04 LTS and 16.04 LTS.
