The following updates has been released for Ubuntu Linux:

USN-3967-1: FFmpeg vulnerabilities
USN-3968-1: Sudo vulnerabilities

USN-3967-1: FFmpeg vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3967-1
May 06, 2019

FFmpeg vulnerabilities
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

FFmpeg could be made to crash if it opened a specially crafted
file.

Software Description:
- ffmpeg: Tools for transcoding, streaming and playing of multimedia
files

Details:

It was discovered that FFmpeg contained multiple security issues when
handling
certain multimedia files. If a user were tricked into opening a crafted
multimedia file, an attacker could cause a denial of service via
application
crash.

Update instructions:

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

Ubuntu 19.04:
ffmpeg 7:4.1.3-0ubuntu1
libavcodec-extra58 7:4.1.3-0ubuntu1
libavcodec58 7:4.1.3-0ubuntu1
libavdevice58 7:4.1.3-0ubuntu1
libavfilter-extra7 7:4.1.3-0ubuntu1
libavfilter7 7:4.1.3-0ubuntu1
libavformat58 7:4.1.3-0ubuntu1
libavresample4 7:4.1.3-0ubuntu1
libavutil56 7:4.1.3-0ubuntu1
libpostproc55 7:4.1.3-0ubuntu1
libswresample3 7:4.1.3-0ubuntu1
libswscale5 7:4.1.3-0ubuntu1

Ubuntu 18.10:
ffmpeg 7:4.0.4-0ubuntu1
libavcodec-extra58 7:4.0.4-0ubuntu1
libavcodec58 7:4.0.4-0ubuntu1
libavdevice58 7:4.0.4-0ubuntu1
libavfilter-extra7 7:4.0.4-0ubuntu1
libavfilter7 7:4.0.4-0ubuntu1
libavformat58 7:4.0.4-0ubuntu1
libavresample4 7:4.0.4-0ubuntu1
libavutil56 7:4.0.4-0ubuntu1
libpostproc55 7:4.0.4-0ubuntu1
libswresample3 7:4.0.4-0ubuntu1
libswscale5 7:4.0.4-0ubuntu1

Ubuntu 18.04 LTS:
ffmpeg 7:3.4.6-0ubuntu0.18.04.1
libavcodec-extra57 7:3.4.6-0ubuntu0.18.04.1
libavcodec57 7:3.4.6-0ubuntu0.18.04.1
libavdevice57 7:3.4.6-0ubuntu0.18.04.1
libavfilter-extra6 7:3.4.6-0ubuntu0.18.04.1
libavfilter6 7:3.4.6-0ubuntu0.18.04.1
libavformat57 7:3.4.6-0ubuntu0.18.04.1
libavresample3 7:3.4.6-0ubuntu0.18.04.1
libavutil55 7:3.4.6-0ubuntu0.18.04.1
libpostproc54 7:3.4.6-0ubuntu0.18.04.1
libswresample2 7:3.4.6-0ubuntu0.18.04.1
libswscale4 7:3.4.6-0ubuntu0.18.04.1

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

References:
https://usn.ubuntu.com/usn/usn-3967-1
CVE-2018-15822, CVE-2019-11338, CVE-2019-11339, CVE-2019-9718,
CVE-2019-9721

Package Information:
https://launchpad.net/ubuntu/+source/ffmpeg/7:4.1.3-0ubuntu1
https://launchpad.net/ubuntu/+source/ffmpeg/7:4.0.4-0ubuntu1
https://launchpad.net/ubuntu/+source/ffmpeg/7:3.4.6-0ubuntu0.18.04.1

USN-3968-1: Sudo vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3968-1
May 06, 2019

sudo vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Sudo.

Software Description:
- sudo: Provide limited super user privileges to specific users

Details:

Florian Weimer discovered that Sudo incorrectly handled the noexec
restriction when used with certain applications. A local attacker could
possibly use this issue to bypass configured restrictions and execute
arbitrary commands. (CVE-2016-7076)

It was discovered that Sudo did not properly parse the contents of
/proc/[pid]/stat when attempting to determine its controlling tty. A local
attacker in some configurations could possibly use this to overwrite any
file on the filesystem, bypassing intended permissions. (CVE-2017-1000368)

Update instructions:

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

Ubuntu 16.04 LTS:
sudo 1.8.16-0ubuntu1.6
sudo-ldap 1.8.16-0ubuntu1.6

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

References:
https://usn.ubuntu.com/usn/usn-3968-1
CVE-2016-7076, CVE-2017-1000368

Package Information:
https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu1.6