[USN-4524-1] TNEF vulnerabilities

Avital Ostromich avital.ostromich at canonical.com
Mon Sep 21 23:15:28 UTC 2020

Ubuntu Security Notice USN-4524-1
September 21, 2020

tnef vulnerabilities

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

- Ubuntu 16.04 LTS


TNEF could be made to crash or write arbitrary files to the filesystem.

Software Description:
- tnef: Tool to unpack MIME application/ms-tnef attachments


Paul Dreik discovered that TNEF incorrectly handled filenames. If a user
were tricked into opening a specially crafted email attachment, an
attacker could possibly use this issue to write arbitrary files to the
filesystem or cause TNEF crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 16.04 LTS:
  tnef                            1.4.9-1+deb8u4build0.16.04.1

In general, a standard system update will make all the necessary changes.


Package Information:

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