CVE-2023-6816

2024-01-1600:00:00

ubuntu.com

x.org server

devicefocusevent

xiquerypointer

heap overflow

button mapping

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

53.7%

JSON

A flaw was found in X.Org server. Both DeviceFocusEvent and the
XIQueryPointer reply contain a bit for each logical button currently down.
Buttons can be arbitrarily mapped to any value up to 255, but the X.Org
Server was only allocating space for the device’s particular number of
buttons, leading to a heap overflow if a bigger value was used.

Notes

Author	Note
mdeslaur	xorg server is actually the xorg-server package the xorg package only contains docs xwayland package contains parts of xorg-server

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchxorg-server< 2:1.19.6-1ubuntu4.15+esm4UNKNOWN
ubuntu20.04noarchxorg-server< 2:1.20.13-1ubuntu1~20.04.14UNKNOWN
ubuntu22.04noarchxorg-server< 2:21.1.4-2ubuntu1.7~22.04.7UNKNOWN
ubuntu23.04noarchxorg-server< 2:21.1.7-1ubuntu3.6UNKNOWN
ubuntu23.10noarchxorg-server< 2:21.1.7-3ubuntu2.6UNKNOWN
ubuntu24.04noarchxorg-server< 2:21.1.11-1ubuntu1UNKNOWN
ubuntu14.04noarchxorg-server< 2:1.15.1-0ubuntu2.11+esm9UNKNOWN
ubuntu16.04noarchxorg-server< 2:1.18.4-0ubuntu0.12+esm9UNKNOWN
ubuntu16.04noarchxorg-server-hwe-16.04< anyUNKNOWN
ubuntu18.04noarchxorg-server-hwe-18.04< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	xorg-server	< 2:1.19.6-1ubuntu4.15+esm4	UNKNOWN
ubuntu	20.04	noarch	xorg-server	< 2:1.20.13-1ubuntu1~20.04.14	UNKNOWN
ubuntu	22.04	noarch	xorg-server	< 2:21.1.4-2ubuntu1.7~22.04.7	UNKNOWN
ubuntu	23.04	noarch	xorg-server	< 2:21.1.7-1ubuntu3.6	UNKNOWN
ubuntu	23.10	noarch	xorg-server	< 2:21.1.7-3ubuntu2.6	UNKNOWN
ubuntu	24.04	noarch	xorg-server	< 2:21.1.11-1ubuntu1	UNKNOWN
ubuntu	14.04	noarch	xorg-server	< 2:1.15.1-0ubuntu2.11+esm9	UNKNOWN
ubuntu	16.04	noarch	xorg-server	< 2:1.18.4-0ubuntu0.12+esm9	UNKNOWN
ubuntu	16.04	noarch	xorg-server-hwe-16.04	< any	UNKNOWN
ubuntu	18.04	noarch	xorg-server-hwe-18.04	< any	UNKNOWN