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Ubuntu 14.04 LTS USN-6699-1: moderate kernel DoS threat fixes

ubuntu
Calendar Grey March 19, 2024
Dist Ubuntu Esm H88
A series of vulnerabilities impacting the Linux kernel have been resolved. Discover the enhancements and patches provided in the latest Ubuntu release.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

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 Quick Fair Queueing scheduler implementation in

the Linux kernel did not properly handle network packets in certain

conditions, 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-2023-4921)

It was discovered that a race condition existed in the SCSI Emulex

LightPulse Fibre Channel driver in the Linux kernel when unregistering FCF

and re-scanning an HBA FCF table, leading to a null pointer dereference

vulnerability. A local attacker could use this t...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel update Ubuntu DoS threat local attack kernel issue ubuntu system crash linux update

Update Instructions

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

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-3.13.0-197-generic  3.13.0-197.248
   linux-image-3.13.0-197-lowlatency  3.13.0-197.248
   linux-image-generic             3.13.0.197.207
   linux-image-generic-lts-trusty  3.13.0.197.207
   linux-image-lowlatency          3.13.0.197.207
   linux-image-server              3.13.0.197.207
   linux-image-virtual             3.13.0.197.207

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-6699-1

CVE-2023-30456, CVE-2023-4921, CVE-2024-24855

Ubuntu Security Notice USN-6699-1

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel update Ubuntu DoS threat local attack kernel issue ubuntu system crash linux update

Package Information

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