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USN-3633-1: Linux kernel (Intel Euclid) vulnerability

24 April 2018

The system could be made to crash or run programs as an administrator.

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Releases

Packages

Details

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code.

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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.

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Update instructions

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

Ubuntu 16.04

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-3523-2: linux-image-4.13.0-1005-azure, linux-image-4.13.0-26-generic, linux-image-4.13.0-26-lowlatency, linux-image-extra-4.13.0-1006-gcp, linux-image-extra-4.13.0-26-generic, linux-oem, linux-azure, linux-hwe, linux-image-4.13.0-1015-oem, linux-image-4.13.0-1006-gcp, linux-image-extra-4.13.0-1005-azure, linux-gcp, linux-image-4.13.0-26-generic-lpae
  • USN-3619-2: linux-lts-xenial, linux-image-4.4.0-119-powerpc64-smp, linux-image-4.4.0-119-powerpc64-emb, linux-image-4.4.0-119-generic-lpae, linux-image-4.4.0-119-generic, linux-aws, linux-image-4.4.0-1016-aws, linux-image-4.4.0-119-powerpc-smp, linux-image-extra-4.4.0-119-generic, linux-image-4.4.0-119-lowlatency, linux-image-4.4.0-119-powerpc-e500mc
  • USN-3619-1: linux-raspi2, linux, linux-image-4.4.0-119-powerpc64-smp, linux-image-4.4.0-119-powerpc64-emb, linux-image-4.4.0-119-generic-lpae, linux-image-4.4.0-1086-raspi2, linux-image-4.4.0-119-generic, linux-aws, linux-image-4.4.0-1054-aws, linux-snapdragon, linux-image-4.4.0-119-powerpc-smp, linux-image-extra-4.4.0-119-generic, linux-image-4.4.0-1088-snapdragon, linux-image-4.4.0-119-lowlatency, linux-image-4.4.0-119-powerpc-e500mc, linux-kvm, linux-image-4.4.0-1020-kvm
  • USN-3523-1: linux, linux-image-lowlatency, linux-image-4.13.0-25-generic, linux-image-generic, linux-image-4.13.0-25-lowlatency
  • USN-3523-3: linux-image-4.13.0-1011-raspi2, linux-raspi2, linux-image-raspi2

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Further reading