USN-3548-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3548-1

26th January, 2018

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

Summary

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

Software description

Details

Jay Vosburgh discovered a logic error in the x86-64 syscall entry
implementation in the Linux kernel, introduced as part of the
mitigations for the Spectre vulnerability. A local attacker could use
this to cause a denial of service or possibly execute arbitrary code.

Update instructions

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

Ubuntu 17.10:

linux-image-4.13.0-32-lowlatency 4.13.0-32.35

linux-image-generic 4.13.0.32.34

linux-image-4.13.0-32-generic 4.13.0-32.35

linux-image-lowlatency 4.13.0.32.34

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

LP: 1745564

from Ubuntu Security Notices http://ift.tt/2n9tbDm