1. Ubuntu Security Notices
  2. USN-6494-1

USN-6494-1: Linux kernel vulnerabilities

Publication date

21 November 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems

Details

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate some attributes passed from userspace. A local
attacker could use this to cause a denial of service (system crash) or
possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did
not properly validate u32 packets content, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate some attributes passed from userspace. A local
attacker could use this to cause a denial of service (system crash) or
possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did
not properly validate u32 packets content, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39192)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate SCTP data, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39193)

Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in
the Linux kernel did not properly handle state filters, leading to an out-
of-bounds read vulnerability. A privileged local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-39194)

Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did
not properly handle socket buffers (skb) when performing IP routing in
certain circumstances, leading to a null pointer dereference vulnerability.
A privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-42754)

It was discovered that the USB ENE card reader driver in the Linux
kernel did not properly allocate enough memory when processing the
storage device boot blocks. A local attacker could use this to cause
a denial of service (system crash). (CVE-2023-45862)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

Budimir Markovic discovered that the perf subsystem in the Linux kernel
did not properly handle event groups, leading to 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-2023-5717)

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
18.04 bionic linux-image-4.15.0-1126-oracle –  4.15.0-1126.137  
linux-image-4.15.0-1147-kvm –  4.15.0-1147.152  
linux-image-4.15.0-1163-aws –  4.15.0-1163.176  
linux-image-4.15.0-220-generic –  4.15.0-220.231  
linux-image-4.15.0-220-lowlatency –  4.15.0-220.231  
linux-image-aws-lts-18.04 –  4.15.0.1163.161  
linux-image-generic –  4.15.0.220.204  
linux-image-kvm –  4.15.0.1147.138  
linux-image-lowlatency –  4.15.0.220.204  
linux-image-oracle-lts-18.04 –  4.15.0.1126.131  
linux-image-virtual –  4.15.0.220.204  
16.04 xenial linux-image-4.15.0-1126-oracle –  4.15.0-1126.137~16.04.1  
linux-image-4.15.0-1163-aws –  4.15.0-1163.176~16.04.1  
linux-image-4.15.0-220-generic –  4.15.0-220.231~16.04.1  
linux-image-4.15.0-220-lowlatency –  4.15.0-220.231~16.04.1  
linux-image-aws-hwe –  4.15.0.1163.146  
linux-image-generic-hwe-16.04 –  4.15.0.220.4  
linux-image-lowlatency-hwe-16.04 –  4.15.0.220.4  
linux-image-oem –  4.15.0.220.4  
linux-image-oracle –  4.15.0.1126.107  
linux-image-virtual-hwe-16.04 –  4.15.0.220.4  

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References

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