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Ubuntu Security Notice USN-3579-1
February 21, 2018

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

LibreOffice would allow unintended access to files over the network.

Software Description:
- libreoffice: Office productivity suite

Details:

It was discovered that =WEBSERVICE calls in a document could be used to
read arbitrary files. If a user were tricked in to opening a specially
crafted document, a remote attacker could exploit this to obtain sensitive
information. (CVE-2018-6871)

Update instructions:

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

Ubuntu 17.10:
  libreoffice-core                1:5.4.5-0ubuntu0.17.10.1

Ubuntu 16.04 LTS:
  libreoffice-core                1:5.1.6~rc2-0ubuntu1~xenial3

Ubuntu 14.04 LTS:
  libreoffice-core                1:4.2.8-0ubuntu5.3

After a standard system update you need to restart LibreOffice to make
all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3579-1
  CVE-2018-6871

Package Information:
  https://launchpad.net/ubuntu/+source/libreoffice/1:5.4.5-0ubuntu0.17.10.1
  https://launchpad.net/ubuntu/+source/libreoffice/1:5.1.6~rc2-0ubuntu1~xenial3
  https://launchpad.net/ubuntu/+source/libreoffice/1:4.2.8-0ubuntu5.3