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: 1.4

Type: local

Agent: unix

Published: 2018/10/29

Modified: 2018/12/01

Dependencies: 12634

Risk Information

Risk Factor: High

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

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

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