USN-3763-1: Linux kernel vulnerability

11 September 2018

The system could be made to crash if it received specially crafted network traffic.

Releases

Packages

Details

Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel
performed algorithmically expensive operations in some situations when
handling incoming packets. A remote attacker could use this to cause a
denial of service.

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-3732-1: linux-image-4.15.0-1017-aws, linux-image-azure, linux-raspi2, linux-image-generic-lpae, linux-image-4.15.0-1015-gcp, linux-image-generic, linux-gcp, linux-image-azure-edge, linux-image-kvm, linux-oem, linux-image-4.15.0-1019-azure, linux-image-4.15.0-30-snapdragon, linux-image-4.15.0-30-lowlatency, linux-image-snapdragon, linux-image-gke, linux-image-raspi2, linux-image-gcp, linux-image-oem, linux-aws, linux-image-aws, linux-image-4.15.0-30-generic-lpae, linux, linux-kvm, linux-azure, linux-image-4.15.0-1018-raspi2, linux-image-4.15.0-30-generic, linux-image-4.15.0-1017-kvm, linux-image-4.15.0-1013-oem, linux-image-lowlatency
  • USN-3732-2: linux-image-azure, linux-image-4.15.0-1015-gcp, linux-image-4.15.0-30-generic-lpae, linux-image-generic-lpae-hwe-16.04, linux-gcp, linux-image-gke, linux-image-gcp, linux-image-4.15.0-1019-azure, linux-image-lowlatency-hwe-16.04, linux-azure, linux-image-4.15.0-30-generic, linux-image-generic-hwe-16.04, linux-image-4.15.0-30-lowlatency, linux-hwe
  • USN-3741-1: linux-image-powerpc64-smp, linux-raspi2, linux-image-4.4.0-133-generic, linux-image-4.4.0-133-powerpc-smp, linux-image-4.4.0-133-powerpc64-smp, linux-image-4.4.0-1065-aws, linux-image-generic-lpae, linux-image-generic, linux-image-kvm, linux-image-powerpc-e500mc, linux-image-snapdragon, linux-snapdragon, linux-image-powerpc64-emb, linux-image-raspi2, linux-image-4.4.0-1098-snapdragon, linux-aws, linux-image-4.4.0-1094-raspi2, linux-image-aws, linux-image-4.4.0-133-powerpc64-emb, linux, linux-kvm, linux-image-4.4.0-133-powerpc-e500mc, linux-image-4.4.0-1031-kvm, linux-image-4.4.0-133-generic-lpae, linux-image-powerpc-smp, linux-image-4.4.0-133-lowlatency, linux-image-lowlatency
  • USN-3741-2: linux-image-aws, linux-image-generic-lpae-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-133-powerpc64-emb, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-133-generic, linux-image-4.4.0-133-powerpc-e500mc, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-133-generic-lpae, linux-lts-xenial, linux-image-4.4.0-133-lowlatency, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1027-aws, linux-image-4.4.0-133-powerpc-smp, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-133-powerpc64-smp, linux-aws, linux-image-generic-lts-xenial
  • USN-3742-1: linux-image-generic, linux-image-powerpc64-smp, linux, linux-image-3.13.0-155-lowlatency, linux-image-3.13.0-155-powerpc64-emb, linux-image-3.13.0-155-powerpc-smp, linux-image-3.13.0-155-powerpc64-smp, linux-image-powerpc64-emb, linux-image-3.13.0-155-generic-lpae, linux-image-3.13.0-155-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-powerpc-smp, linux-image-generic-lpae, linux-image-powerpc-e500, linux-image-lowlatency, linux-image-3.13.0-155-powerpc-e500, linux-image-3.13.0-155-generic
  • USN-3742-2: linux-image-generic-lpae-lts-trusty, linux-lts-trusty, linux-image-3.13.0-155-generic-lpae, linux-image-generic-lts-trusty, linux-image-3.13.0-155-generic