Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-3775-2: Linux kernel (Trusty HWE) vulnerabilities

1 October 2018

Several security issues were fixed in the Linux kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

  • linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3775-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
attacker could use this to expose sensitive information. (CVE-2018-15594)

It was discovered that microprocessors utilizing speculative execution and
prediction of return addresses via Return Stack Buffer (RSB) may allow
unauthorized memory reads via sidechannel attacks. An attacker could use
this to expose sensitive information. (CVE-2018-15572)

It was discovered that an integer overflow vulnerability existed in the
Linux kernel when loading an executable to run. A local attacker could use
this to gain administrative privileges. (CVE-2018-14634)

It was discovered that a stack-based buffer overflow existed in the iSCSI
target implementation of the Linux kernel. A remote attacker could use this
to cause a denial of service (system crash). (CVE-2018-14633)

It was discovered that a memory leak existed in the IRDA subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(kernel memory exhaustion). (CVE-2018-6554)

It was discovered that a use-after-free vulnerability existed in the IRDA
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-6555)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 12.04

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

Related notices

  • USN-3776-1: linux-image-4.4.0-1102-snapdragon, linux-image-4.4.0-1069-aws, linux-image-4.4.0-137-generic, linux-kvm, linux-image-extra-4.4.0-137-generic, linux-image-4.4.0-1098-raspi2, linux-raspi2, linux-snapdragon, linux-aws, linux-image-4.4.0-1035-kvm, linux-image-4.4.0-137-powerpc64-emb, linux, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-137-powerpc-e500mc, linux-image-4.4.0-137-powerpc-smp, linux-image-4.4.0-137-powerpc64-smp, linux-image-4.4.0-137-generic-lpae
  • USN-3776-2: linux-image-4.4.0-1031-aws, linux-lts-xenial, linux-image-4.4.0-137-generic, linux-image-extra-4.4.0-137-generic, linux-aws, linux-image-4.4.0-137-powerpc64-emb, linux-image-4.4.0-137-powerpc-e500mc, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-137-powerpc-smp, linux-image-4.4.0-137-powerpc64-smp, linux-image-4.4.0-137-generic-lpae
  • USN-3777-2: linux-image-unsigned-4.15.0-36-lowlatency, linux-image-4.15.0-36-generic, linux-image-unsigned-4.15.0-1021-gcp, linux-image-4.15.0-36-generic-lpae, linux-gcp, linux-hwe, linux-image-unsigned-4.15.0-36-generic, linux-image-4.15.0-36-lowlatency
  • USN-3777-1: linux-image-unsigned-4.15.0-36-lowlatency, linux-image-4.15.0-36-generic, linux-image-unsigned-4.15.0-1021-gcp, linux-kvm, linux-gcp, linux-image-4.15.0-36-generic-lpae, linux-oem, linux-raspi2, linux-image-unsigned-4.15.0-36-generic, linux-aws, linux-image-4.15.0-36-snapdragon, linux-image-unsigned-4.15.0-1021-oem, linux, linux-image-4.15.0-1023-kvm, linux-image-4.15.0-1024-raspi2, linux-image-4.15.0-1023-aws, linux-image-4.15.0-36-lowlatency
  • USN-3777-3: linux-azure, linux-image-unsigned-4.15.0-1025-azure
  • USN-3779-1: linux-image-3.2.0-136-omap, linux-image-omap, linux-image-generic-pae, linux-image-3.2.0-136-powerpc-smp, linux-image-3.2.0-136-virtual, linux-image-3.2.0-136-generic, linux-image-generic, linux-image-3.2.0-136-generic-pae, linux, linux-image-3.2.0-136-powerpc64-smp, linux-image-highbank, linux-image-powerpc, linux-image-powerpc-smp, linux-image-powerpc64-smp, linux-image-3.2.0-136-highbank
  • USN-3775-1: linux-image-3.13.0-160-powerpc-e500, linux-image-3.13.0-160-generic-lpae, linux-image-3.13.0-160-powerpc64-smp, linux-image-3.13.0-160-powerpc-smp, linux-image-3.13.0-160-generic, linux, linux-image-3.13.0-160-powerpc-e500mc, linux-image-extra-3.13.0-160-generic, linux-image-3.13.0-160-powerpc64-emb, linux-image-3.13.0-160-lowlatency

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading