The following updates has been released for Ubuntu Linux:

USN-3666-1: Oslo middleware vulnerability
USN-3667-1: libytnef vulnerabilities

USN-3666-1: Oslo middleware vulnerability

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Ubuntu Security Notice USN-3666-1
May 31, 2018

python-oslo.middleware vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Applications using Oslo middleware could be made to expose sensitive
information.

Software Description:
- python-oslo.middleware: WSGI middleware components for OpenStack

Details:

Divya K Konoor discovered Oslo middleware was vulnerable to an information
disclosure. A local attacker could exploit this flaw to obtain sensitive
information from OpenStack component error logs.

Update instructions:

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

Ubuntu 16.04 LTS:
python-oslo.middleware 3.8.0-2ubuntu1
python-oslo.middleware-doc 3.8.0-2ubuntu1

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

References:
https://usn.ubuntu.com/usn/usn-3666-1
CVE-2017-2592, https://launchpad.net/bugs/1628031

Package Information:
https://launchpad.net/ubuntu/+source/python-oslo.middleware/3.8.0-2ubuntu1

USN-3667-1: libytnef vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3667-1
May 31, 2018

libytnef vulnerabilities
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in libytnef.

Software Description:
- libytnef: improved decoder for application/ms-tnef attachments

Details:

It was discovered that libytnef incorrectly handled certain files.
An attacker could possibly use this to cause a denial of service.
(CVE-2017-12141, CVE-2017-9146, CVE-2017-9471, CVE-2017-9473)

It was discovered that libytnef incorrectly handled certain files.
An attacker could possibly use this to access sensitive information.
(CVE-2017-9058)

Update instructions:

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

Ubuntu 14.04 LTS:
  libytnef0 1.5-6ubuntu0.2

After a standard system update you need to restart applications using
libytnef, such as Evolution, to make all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3667-1
  CVE-2017-12141, CVE-2017-9058, CVE-2017-9146, CVE-2017-9471,
  CVE-2017-9473

Package Information:
  https://launchpad.net/ubuntu/+source/libytnef/1.5-6ubuntu0.2