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Ubuntu 22.04 LTS: 6443-1 Critical: Kernel Denial of Service Threats

ubuntu
Calendar Grey October 20, 2023
Dist Ubuntu Esm H88
Significant security vulnerabilities in the Ubuntu Linux kernel have been addressed, particularly for OEM systems. Affected users should update installations promptly for optimal security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.1: Linux kernel for OEM systems

Details:

Bien Pham discovered that the netfiler subsystem in the Linux kernel

contained a race condition, leading to a use-after-free vulnerability. A

local user could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2023-4244)

Kyle Zeng discovered that the networking stack implementation in the Linux

kernel did not properly validate skb object size in certain conditions. An

attacker could use this cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2023-42752)

Kyle Zeng discovered that the IPv4 Resource Reservation Protocol (RSVP)

classifier implementation in the Linux kernel contained an out-of-bounds

read vulnerability. A local attacker could use this to cause a denial of

service (system crash). Please note that kernel packet classifier support

for RSVP has...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update instructions system crash security issues linux-oem-6.1

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1024-oem      6.1.0-1024.24
   linux-image-oem-22.04           6.1.0.1024.25
   linux-image-oem-22.04a          6.1.0.1024.25
   linux-image-oem-22.04b          6.1.0.1024.25
   linux-image-oem-22.04c          6.1.0.1024.25

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-6443-1

CVE-2023-4244, CVE-2023-42752, CVE-2023-42755, CVE-2023-42756,

CVE-2023-4881, CVE-2023-5197

Severity
critical
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-6443-1

Topics%20covered

Topics Covered

security advisory denial of service update instructions system crash security issues linux-oem-6.1

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1024.24

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