Ubuntu 16.04 LTS / 18.04 LTS / 18.10 : xorg-server, xorg-server-hwe-16.04 vulnerability (USN-3802-1)

High Nessus Plugin ID 118492

Synopsis

The remote Ubuntu host is missing one or more security-related
patches.

Description

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.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution

Update the affected xserver-xorg-core and / or
xserver-xorg-core-hwe-16.04 packages.

See Also

https://usn.ubuntu.com/3802-1/

Plugin Details

Severity: High

ID: 118492

File Name: ubuntu_USN-3802-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 2018/10/29

Modified: 2019/01/25

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

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

CVSS v3.0

Base Score: 6.6

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core, p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-hwe-16.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.10

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/10/26

Exploitable With

Metasploit (Xorg X11 Server SUID privilege escalation)

Reference Information

CVE: CVE-2018-14665

USN: 3802-1

IAVB: 2018-B-0140