USN-3288-1: libytnef vulnerabilities

Ubuntu Security Notice USN-3288-1

15th 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

Update instructions

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

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.


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