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Ubuntu 14.04 LTS / 16.04 LTS : X.Org X server vulnerabilities (USN-3453-1)

high Nessus Plugin ID 103834

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3453-1 advisory.

 Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session. (CVE-2017-13721)

 Michal Srb discovered that the X.Org X server incorrectly handled XKB buffers. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly execute arbitrary code. (CVE-2017-13723)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-3453-1

Plugin Details

Severity: High

ID: 103834

File Name: ubuntu_USN-3453-1.nasl

Version: 3.11

Type: local

Agent: unix

Published: 10/13/2017

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2017-13723

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:xdmx, p-cpe:/a:canonical:ubuntu_linux:xserver-xephyr, p-cpe:/a:canonical:ubuntu_linux:xserver-common, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-udeb, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-dev-lts-xenial, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-dev, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-legacy-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:xmir, p-cpe:/a:canonical:ubuntu_linux:xvfb, p-cpe:/a:canonical:ubuntu_linux:xserver-xephyr-lts-xenial, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-dev-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-legacy, p-cpe:/a:canonical:ubuntu_linux:xmir-hwe-16.04, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:xserver-xephyr-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:xwayland, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:xorg-server-source-lts-xenial, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-lts-xenial, p-cpe:/a:canonical:ubuntu_linux:xorg-server-source-hwe-16.04, p-cpe:/a:canonical:ubuntu_linux:xwayland-lts-xenial, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-xmir, p-cpe:/a:canonical:ubuntu_linux:xnest, p-cpe:/a:canonical:ubuntu_linux:xorg-server-source, p-cpe:/a:canonical:ubuntu_linux:xdmx-tools, p-cpe:/a:canonical:ubuntu_linux:xwayland-hwe-16.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2017

Vulnerability Publication Date: 10/10/2017

Reference Information

CVE: CVE-2017-13721, CVE-2017-13723

USN: 3453-1