USN-3288-1: libytnef vulnerabilities

15 May 2017

libytnef vulnerabilities

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

  • Ubuntu 14.04 LTS


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


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

To update your system, please follow these instructions:

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