=========================================================================Ubuntu Security Notice USN-3288-1
May 15, 2017

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

- Ubuntu 14.04 LTS

Summary:

libytnef could be made to crash or run programs as your login if it opened
a specially crafted file.

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

Details:

It was discovered that libytnef incorrectly handled malformed TNEF streams.
If a user were tricked into opening a specially crafted TNEF attachment, an
attacker could 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 versions:

Ubuntu 14.04 LTS:
  libytnef0                       1.5-6ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-3288-1
  CVE-2017-6298, CVE-2017-6299, CVE-2017-6300, CVE-2017-6301,
  CVE-2017-6302, CVE-2017-6303, CVE-2017-6304, CVE-2017-6305,
  CVE-2017-6306, CVE-2017-6800, CVE-2017-6801, CVE-2017-6802

Package Information:
  https://launchpad.net/ubuntu/+source/libytnef/1.5-6ubuntu0.1