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Ubuntu Security Notice USN-4524-1

Ubuntu Security Notice USN-4524-1
Posted Sep 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4524-1 - 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.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-18849
SHA-256 | 9dae4bef7f22d332fc118db9cc9179022b8d88ceeaedb2803a8459a640f9408b

Ubuntu Security Notice USN-4524-1

Change Mirror Download
==========================================================================
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

Summary:

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

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

Details:

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.
(CVE-2019-18849)

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.

References:
https://usn.ubuntu.com/4524-1
CVE-2019-18849

Package Information:
https://launchpad.net/ubuntu/+source/tnef/1.4.9-1+deb8u4build0.16.04.1
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