libytnef could be made to crash or run programs as your login if it opened a specially crafted file.
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.
15 May 2017
A security issue affects these releases of Ubuntu and its derivatives:
libytnef could be made to crash or run programs as your login if it opened a specially crafted file.
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.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart applications using libytnef, such as Evolution, to make all the necessary changes.
Vulmon