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CVE-2023-0494

Publication date 7 February 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

Read the notes from the security team

Status

Package Ubuntu Release Status
xorg-server 23.04 lunar
Fixed 2:21.1.7-1ubuntu1
22.10 kinetic
Fixed 2:21.1.4-2ubuntu1.5
22.04 LTS jammy
Fixed 2:21.1.3-2ubuntu2.7
20.04 LTS focal
Fixed 2:1.20.13-1ubuntu1~20.04.6
18.04 LTS bionic
Fixed 2:1.19.6-1ubuntu4.14
16.04 LTS xenial
14.04 LTS trusty
xorg-server-hwe-16.04 22.10 kinetic Not in release
22.04 LTS jammy 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 22.10 kinetic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 2:1.20.8-2ubuntu2.2~18.04.10
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
xorg-server-lts-utopic 22.10 kinetic Not in release
22.04 LTS jammy Not in release
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 Ignored end of standard support
xorg-server-lts-vivid 22.10 kinetic Not in release
22.04 LTS jammy Not in release
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 Ignored end of standard support
xorg-server-lts-wily 22.10 kinetic Not in release
22.04 LTS jammy Not in release
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 Ignored end of standard support
xorg-server-lts-xenial 22.10 kinetic Not in release
22.04 LTS jammy Not in release
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 Ignored end of standard support
xwayland 23.04 lunar
Fixed 2:22.1.8-1
22.10 kinetic
Fixed 2:22.1.3-2ubuntu0.3
22.04 LTS jammy
Fixed 2:22.1.1-1ubuntu0.5
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

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-5846-1
    • X.Org X Server vulnerability
    • 7 February 2023
    • USN-5778-2
    • X.Org X Server vulnerabilities
    • 16 February 2023

Other references