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CVE-2021-4008

Published: 14 December 2021

A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcRenderCompositeGlyphs function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Notes

AuthorNote
mdeslaur
xorg server is actually the xorg-server package
the xorg package only contains docs
xwayland package contains parts of xorg-server
This is ZDI-CAN-14192

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
xorg-server
Launchpad, Ubuntu, Debian
impish
Released (2:1.20.13-1ubuntu1.1)
jammy
Released (2:1.20.13-1ubuntu2)
kinetic
Released (2:1.20.13-1ubuntu2)
lunar
Released (2:1.20.13-1ubuntu2)
trusty
Released (2:1.15.1-0ubuntu2.11+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (2:1.18.4-0ubuntu0.12+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (21.1.2)
bionic
Released (2:1.19.6-1ubuntu4.10)
focal
Released (2:1.20.13-1ubuntu1~20.04.2)
hirsute
Released (2:1.20.11-1ubuntu1.2)
Patches:
upstream: https://gitlab.freedesktop.org/xorg/xserver/-/commit/ebce7e2d80e7c80e1dda60f2f0bc886f1106ba60
xorg-server-hwe-16.04
Launchpad, Ubuntu, Debian
jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

xenial
Released (2:1.19.6-1ubuntu4.1~16.04.6+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xorg-server-hwe-18.04
Launchpad, Ubuntu, Debian
bionic
Released (2:1.20.8-2ubuntu2.2~18.04.6)
focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

xwayland
Launchpad, Ubuntu, Debian
focal Does not exist

jammy
Released (2:21.1.3-1ubuntu1)
kinetic
Released (2:21.1.3-1ubuntu1)
lunar
Released (2:21.1.3-1ubuntu1)
trusty Does not exist

upstream
Released (21.1.4)
xenial Does not exist

bionic Does not exist

hirsute
Released (2:21.1.1-0ubuntu1.1)
impish
Released (2:21.1.2-0ubuntu1.1)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H