=========================================================================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://ubuntu.com/security/notices/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