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CVE-2018-14665

Published: 25 October 2018

A flaw was found in xorg-x11-server before 1.20.3. An incorrect permission check for -modulepath and -logfile options when starting Xorg. X server allows unprivileged users with the ability to log in to the system via physical console to escalate their privileges and run arbitrary code under root privileges.

Notes

AuthorNote
mdeslaur
xorg server is actually the xorg-server package
the xorg package only contains docs
introduced by:
https://gitlab.freedesktop.org/xorg/xserver/commit/032b1d79b7

Priority

Medium

Cvss 3 Severity Score

6.6

Score breakdown

Status

Package Release Status
xorg-server-lts-wily
Launchpad, Ubuntu, Debian
cosmic Does not exist

bionic Does not exist

trusty Does not exist
(trusty was ignored [end of life])
upstream Needs triage

xenial Does not exist

xorg
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
cosmic Not vulnerable
(code not present)
trusty Does not exist
(trusty was not-affected [code not present])
upstream Not vulnerable

xenial Not vulnerable
(code not present)
xorg-hwe-16.04
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist

upstream Not vulnerable

xenial Not vulnerable
(code not present)
xorg-server
Launchpad, Ubuntu, Debian
bionic
Released (2:1.19.6-1ubuntu4.2)
cosmic
Released (2:1.20.1-3ubuntu2.1)
trusty Not vulnerable
(2:1.15.1-0ubuntu2.11)
upstream Needs triage

xenial Not vulnerable
(2:1.18.4-0ubuntu0.8)
Patches:
upstream: https://gitlab.freedesktop.org/xorg/xserver/commit/50c0cf885a6e91c0ea71fb49fa8f1b7c86fe330e
xorg-server-hwe-16.04
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (2:1.19.6-1ubuntu4.1~16.04.2)
xorg-server-lts-utopic
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [end of life])
upstream Needs triage

xenial Does not exist

xorg-server-lts-vivid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [end of life])
upstream Needs triage

xenial Does not exist

xorg-server-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was not-affected [2:1.18.3-1ubuntu2.3~trusty4])
upstream Needs triage

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 6.6
Attack vector Physical
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H