1. Ubuntu Security Notices
  2. USN-3797-1

USN-3797-1: Linux kernel vulnerabilities

Publication date

23 October 2018

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Noam Rathaus discovered that a use-after-free vulnerability existed in the
Infiniband implementation in the Linux kernel. An attacker could use this
to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that an integer overflow existed in the CD-ROM driver of
the Linux kernel. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-16658)

It was discovered that an integer overflow existed in the HID Bluetooth
implementation in the Linux kernel that could lead to a buffer overwrite.
An attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-9363)

Yves Younan discovered that the CIPSO labeling implementation in the Linux
kernel did not properly handle IP header options in some situations....

Noam Rathaus discovered that a use-after-free vulnerability existed in the
Infiniband implementation in the Linux kernel. An attacker could use this
to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that an integer overflow existed in the CD-ROM driver of
the Linux kernel. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-16658)

It was discovered that an integer overflow existed in the HID Bluetooth
implementation in the Linux kernel that could lead to a buffer overwrite.
An attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-9363)

Yves Younan discovered that the CIPSO labeling implementation in the Linux
kernel did not properly handle IP header options in some situations. A
remote attacker could use this to specially craft network traffic that
could cause a denial of service (infinite loop). (CVE-2018-10938)

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
16.04 xenial linux-image-4.4.0-1036-kvm –  4.4.0-1036.42
linux-image-4.4.0-1070-aws –  4.4.0-1070.80
linux-image-4.4.0-1099-raspi2 –  4.4.0-1099.107
linux-image-4.4.0-1103-snapdragon –  4.4.0-1103.108
linux-image-4.4.0-138-generic –  4.4.0-138.164
linux-image-4.4.0-138-generic-lpae –  4.4.0-138.164
linux-image-4.4.0-138-lowlatency –  4.4.0-138.164
linux-image-4.4.0-138-powerpc-e500mc –  4.4.0-138.164
linux-image-4.4.0-138-powerpc-smp –  4.4.0-138.164
linux-image-4.4.0-138-powerpc64-emb –  4.4.0-138.164
linux-image-4.4.0-138-powerpc64-smp –  4.4.0-138.164

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References

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