CVE-2021-4011

Publication date 14 December 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

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 SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Read the notes from the security team

Status

Package Ubuntu Release Status
xorg-server 23.04 lunar
Fixed 2:1.20.13-1ubuntu2
22.10 kinetic
Fixed 2:1.20.13-1ubuntu2
22.04 LTS jammy
Fixed 2:1.20.13-1ubuntu2
21.10 impish
Fixed 2:1.20.13-1ubuntu1.1
21.04 hirsute
Fixed 2:1.20.11-1ubuntu1.2
20.04 LTS focal
Fixed 2:1.20.13-1ubuntu1~20.04.2
18.04 LTS bionic
Fixed 2:1.19.6-1ubuntu4.10
16.04 LTS xenial
14.04 LTS trusty
xorg-server-hwe-16.04 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
14.04 LTS trusty Not in release
xorg-server-hwe-18.04 23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.6
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
xwayland 23.04 lunar
Fixed 2:21.1.3-1ubuntu1
22.10 kinetic
Fixed 2:21.1.3-1ubuntu1
22.04 LTS jammy
Fixed 2:21.1.3-1ubuntu1
21.10 impish
Fixed 2:21.1.2-0ubuntu1.1
21.04 hirsute
Fixed 2:21.1.1-0ubuntu1.1
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

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Notes

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-14952

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
xorg-server

Severity score breakdown

Parameter Value
Base score 7.8 · High
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

References

Related Ubuntu Security Notices (USN)

    • USN-5193-1
    • X.Org X Server vulnerabilities
    • 14 December 2021
    • USN-5193-2
    • X.Org X Server vulnerabilities
    • 26 January 2022
    • USN-5193-3
    • X.Org X Server vulnerabilities
    • 27 July 2023

Other references