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Ubuntu Security Notice USN-3579-2
February 28, 2018

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

– Ubuntu 17.10

Summary:

USN-3579-1 caused a regression in LibreOffice.

Software Description:
– libreoffice: Office productivity suite

Details:

USN-3579-1 fixed a vulnerability in LibreOffice. After upgrading, it was
no longer possible for LibreOffice to open documents from certain
locations outside of the user’s home directory. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory 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-common 1:5.4.5-0ubuntu0.17.10.4

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

References:
https://usn.ubuntu.com/usn/usn-3579-2
https://usn.ubuntu.com/usn/usn-3579-1
https://launchpad.net/bugs/1751005

Package Information:
https://launchpad.net/ubuntu/+source/libreoffice/1:5.4.5-0ubuntu0.17.10.4

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