[USN-3802-1] X.Org X server vulnerability


This is an OpenPGP/MIME signed message (RFC 4880 and 3156)

protocol=”application/pgp-signature”;
boundary=”ZMKlH5Li2x3LniPQZMY3DSrx1TuJXzsBd”

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
–ZMKlH5Li2x3LniPQZMY3DSrx1TuJXzsBd

protected-headers=”v1″
From: Marc Deslauriers
Reply-To: Ubuntu Security
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID:
Subject: [USN-3802-1] X.Org X server vulnerability

–FDdcyF1mvM6gthzR49bIniHZgjHfV63TY

Content-Language: en-CA
Content-Transfer-Encoding: quoted-printable

=
=

Ubuntu Security Notice USN-3802-1
October 26, 2018

xorg-server, xorg-server-hwe-16.04 vulnerability
=
=

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

– Ubuntu 18.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

X.Org X server could be made to overwrite files as the administrator.

Software Description:
– xorg-server: X.Org X11 server
– xorg-server-hwe-16.04: X.Org X11 server

Details:

Narendra Shinde discovered that the X.Org X server incorrectly handled
certain command line parameters when running as root with the legacy
wrapper. When certain graphics drivers are being used, a local attacker
could possibly use this issue to overwrite arbitrary files and escalate
privileges.

Update instructions:

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

Ubuntu 18.10:
xserver-xorg-core 2:1.20.1-3ubuntu2.1

Ubuntu 18.04 LTS:
xserver-xorg-core 2:1.19.6-1ubuntu4.2

Ubuntu 16.04 LTS:
xserver-xorg-core-hwe-16.04 2:1.19.6-1ubuntu4.1~16.04.2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3802-1
CVE-2018-14665

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.1-3ubuntu2.1
https://launchpad.net/ubuntu/+source/xorg-server/2:1.19.6-1ubuntu4.2

https://launchpad.net/ubuntu/+source/xorg-server-hwe-16.04/2:1.19.6-1ubun=
tu4.1~16.04.2

–FDdcyF1mvM6gthzR49bIniHZgjHfV63TY–

–ZMKlH5Li2x3LniPQZMY3DSrx1TuJXzsBd

Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename=”signature.asc”

—–BEGIN PGP SIGNATURE—–
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=4UWW
—–END PGP SIGNATURE—–

–ZMKlH5Li2x3LniPQZMY3DSrx1TuJXzsBd–

MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

LS0gCnVidW50dS1zZWN1cml0eS1hbm5vdW5jZSBtYWlsaW5nIGxpc3QKdWJ1bnR1LXNlY3VyaXR5
LWFubm91bmNlQGxpc3RzLnVidW50dS5jb20KTW9kaWZ5IHNldHRpbmdzIG9yIHVuc3Vic2NyaWJl
IGF0OiBodHRwczovL2xpc3RzLnVidW50dS5jb20vbWFpbG1hbi9saXN0aW5mby91YnVudHUtc2Vj
dXJpdHktYW5ub3VuY2UK