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Ubuntu Security Notice USN-5565-1

Ubuntu Security Notice USN-5565-1
Posted Aug 11, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5565-1 - Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not properly remove all references to a route filter before freeing it in some situations. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the netfilter subsystem of the Linux kernel did not prevent one nft object from referencing an nft set in another nft table, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-2585, CVE-2022-2586, CVE-2022-2588, CVE-2022-29900, CVE-2022-29901
SHA-256 | 484e185b1094f77c20937b1f6cdb7e94436b94b7ed29b91894907086a9eaadad

Ubuntu Security Notice USN-5565-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5565-1
August 10, 2022

linux, linux-hwe-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15
vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-lowlatency: Linux low latency kernel
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-lowlatency-hwe-5.15: Linux low latency kernel

Details:

Zhenpeng Lin discovered that the network packet scheduler implementation in
the Linux kernel did not properly remove all references to a route filter
before freeing it in some situations. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-2588)

It was discovered that the netfilter subsystem of the Linux kernel did not
prevent one nft object from referencing an nft set in another nft table,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-2586)

It was discovered that the implementation of POSIX timers in the Linux
kernel did not properly clean up timers in some situations. A local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2022-2585)

Johannes Wikner and Kaveh Razavi discovered that for some AMD x86-64
processors, the branch predictor could by mis-trained for return
instructions in certain circumstances. A local attacker could possibly use
this to expose sensitive information. (CVE-2022-29900)

Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64
processors, the Linux kernel's protections against speculative branch
target injection attacks were insufficient in some circumstances. A local
attacker could possibly use this to expose sensitive information.
(CVE-2022-29901)

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.15.0-46-generic 5.15.0-46.49
linux-image-5.15.0-46-generic-64k 5.15.0-46.49
linux-image-5.15.0-46-generic-lpae 5.15.0-46.49
linux-image-5.15.0-46-lowlatency 5.15.0-46.49
linux-image-5.15.0-46-lowlatency-64k 5.15.0-46.49
linux-image-generic 5.15.0.46.46
linux-image-generic-64k 5.15.0.46.46
linux-image-generic-64k-hwe-22.04 5.15.0.46.46
linux-image-generic-hwe-22.04 5.15.0.46.46
linux-image-generic-lpae 5.15.0.46.46
linux-image-generic-lpae-hwe-22.04 5.15.0.46.46
linux-image-lowlatency 5.15.0.46.43
linux-image-lowlatency-64k 5.15.0.46.43
linux-image-lowlatency-64k-hwe-22.04 5.15.0.46.43
linux-image-lowlatency-hwe-22.04 5.15.0.46.43
linux-image-virtual 5.15.0.46.46
linux-image-virtual-hwe-22.04 5.15.0.46.46

Ubuntu 20.04 LTS:
linux-image-5.15.0-46-generic 5.15.0-46.49~20.04.1
linux-image-5.15.0-46-generic-64k 5.15.0-46.49~20.04.1
linux-image-5.15.0-46-generic-lpae 5.15.0-46.49~20.04.1
linux-image-5.15.0-46-lowlatency 5.15.0-46.49~20.04.1
linux-image-5.15.0-46-lowlatency-64k 5.15.0-46.49~20.04.1
linux-image-generic-64k-hwe-20.04 5.15.0.46.49~20.04.16
linux-image-generic-hwe-20.04 5.15.0.46.49~20.04.16
linux-image-generic-lpae-hwe-20.04 5.15.0.46.49~20.04.16
linux-image-lowlatency-64k-hwe-20.04 5.15.0.46.49~20.04.15
linux-image-lowlatency-hwe-20.04 5.15.0.46.49~20.04.15
linux-image-virtual-hwe-20.04 5.15.0.46.49~20.04.16

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-5565-1
CVE-2022-2585, CVE-2022-2586, CVE-2022-2588, CVE-2022-29900,
CVE-2022-29901

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-46.49
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-46.49
https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-46.49~20.04.1

https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-46.49~20.04.1
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