USN-6548-1: Linux kernel vulnerabilities

Publication date

11 December 2023

Overview

Several security issues were fixed in the Linux kernel.


Packages

Details

It was discovered that Spectre-BHB mitigations were missing for Ampere
processors. A local attacker could potentially use this to expose sensitive
information. (CVE-2023-3006)

It was discovered that the USB subsystem in the Linux kernel contained a
race condition while handling device descriptors in certain situations,
leading to a out-of-bounds read vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2023-37453)

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...

It was discovered that Spectre-BHB mitigations were missing for Ampere
processors. A local attacker could potentially use this to expose sensitive
information. (CVE-2023-3006)

It was discovered that the USB subsystem in the Linux kernel contained a
race condition while handling device descriptors in certain situations,
leading to a out-of-bounds read vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2023-37453)

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)

Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel
did not properly handle queue initialization failures in certain
situations, leading to a use-after-free vulnerability. A remote attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-5178)

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)

It was discovered that the TLS subsystem in the Linux kernel did not
properly perform cryptographic operations in some situations, leading to a
null pointer dereference vulnerability. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-6176)


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
20.04 focal linux-image-5.4.0-1035-xilinx-zynqmp –  5.4.0-1035.39
linux-image-5.4.0-1063-ibm –  5.4.0-1063.68
linux-image-5.4.0-1076-bluefield –  5.4.0-1076.82
linux-image-5.4.0-1104-kvm –  5.4.0-1104.111
linux-image-5.4.0-1116-aws –  5.4.0-1116.126
linux-image-5.4.0-1120-gcp –  5.4.0-1120.129
linux-image-5.4.0-1121-azure –  5.4.0-1121.128
linux-image-5.4.0-169-generic –  5.4.0-169.187
linux-image-5.4.0-169-generic-lpae –  5.4.0-169.187
linux-image-5.4.0-169-lowlatency –  5.4.0-169.187
linux-image-aws-lts-20.04 –  5.4.0.1116.113
linux-image-azure-lts-20.04 –  5.4.0.1121.114
linux-image-bluefield –  5.4.0.1076.71
linux-image-gcp-lts-20.04 –  5.4.0.1120.122
linux-image-generic –  5.4.0.169.167
linux-image-generic-lpae –  5.4.0.169.167
linux-image-ibm-lts-20.04 –  5.4.0.1063.92
linux-image-kvm –  5.4.0.1104.100
linux-image-lowlatency –  5.4.0.169.167
linux-image-oem –  5.4.0.169.167
linux-image-oem-osp1 –  5.4.0.169.167
linux-image-virtual –  5.4.0.169.167
linux-image-xilinx-zynqmp –  5.4.0.1035.35
18.04 bionic linux-image-5.4.0-1063-ibm –  5.4.0-1063.68~18.04.1  
linux-image-5.4.0-1116-aws –  5.4.0-1116.126~18.04.1  
linux-image-5.4.0-1120-gcp –  5.4.0-1120.129~18.04.1  
linux-image-5.4.0-1121-azure –  5.4.0-1121.128~18.04.1  
linux-image-5.4.0-169-generic –  5.4.0-169.187~18.04.1  
linux-image-5.4.0-169-lowlatency –  5.4.0-169.187~18.04.1  
linux-image-aws –  5.4.0.1116.94  
linux-image-azure –  5.4.0.1121.94  
linux-image-gcp –  5.4.0.1120.96  
linux-image-generic-hwe-18.04 –  5.4.0.169.187~18.04.137  
linux-image-ibm –  5.4.0.1063.73  
linux-image-lowlatency-hwe-18.04 –  5.4.0.169.187~18.04.137  
linux-image-oem –  5.4.0.169.187~18.04.137  
linux-image-oem-osp1 –  5.4.0.169.187~18.04.137  
linux-image-snapdragon-hwe-18.04 –  5.4.0.169.187~18.04.137  
linux-image-virtual-hwe-18.04 –  5.4.0.169.187~18.04.137  

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