USN-6555-2

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-6555-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6555-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-6555-2
Upstream
Related
Published
2023-12-13T17:41:03.120031Z
Modified
2025-07-16T08:35:45.741710Z
Summary
xorg-server vulnerabilities
Details

USN-6555-1 fixed several vulnerabilities in X.Org. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled XKB button actions. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. (CVE-2023-6377)

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled memory when processing the RRChangeOutputProperty and RRChangeProviderProperty APIs. An attacker could possibly use this issue to cause the X Server to crash, or obtain sensitive information. (CVE-2023-6478)

References

Affected packages

Ubuntu:Pro:16.04:LTS / xorg-server

Package

Name
xorg-server
Purl
pkg:deb/ubuntu/xorg-server@2:1.18.4-0ubuntu0.12+esm8?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.18.4-0ubuntu0.12+esm8

Affected versions

2:1.*

2:1.17.2-1ubuntu9
2:1.17.2-1ubuntu10
2:1.17.3-2ubuntu1
2:1.17.3-2ubuntu2
2:1.17.3-2ubuntu3
2:1.17.3-2ubuntu4
2:1.18.1-1ubuntu3
2:1.18.1-1ubuntu4
2:1.18.3-1ubuntu1
2:1.18.3-1ubuntu2
2:1.18.3-1ubuntu2.2
2:1.18.3-1ubuntu2.3
2:1.18.4-0ubuntu0.1
2:1.18.4-0ubuntu0.2
2:1.18.4-0ubuntu0.3
2:1.18.4-0ubuntu0.4
2:1.18.4-0ubuntu0.6
2:1.18.4-0ubuntu0.7
2:1.18.4-0ubuntu0.8
2:1.18.4-0ubuntu0.9
2:1.18.4-0ubuntu0.10
2:1.18.4-0ubuntu0.11
2:1.18.4-0ubuntu0.12
2:1.18.4-0ubuntu0.12+esm1
2:1.18.4-0ubuntu0.12+esm2
2:1.18.4-0ubuntu0.12+esm4
2:1.18.4-0ubuntu0.12+esm5
2:1.18.4-0ubuntu0.12+esm6

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "xdmx",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xdmx-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xdmx-tools",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xdmx-tools-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xmir",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xmir-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xnest",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xnest-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xorg-server-source",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-common",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xephyr",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xephyr-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-core",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-core-dbg",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-core-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-core-udeb",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-core-udeb-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-dev",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-legacy",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-legacy-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xserver-xorg-xmir",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xvfb",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xvfb-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xwayland",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        },
        {
            "binary_name": "xwayland-dbgsym",
            "binary_version": "2:1.18.4-0ubuntu0.12+esm8"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / xorg-server

Package

Name
xorg-server
Purl
pkg:deb/ubuntu/xorg-server@2:1.19.6-1ubuntu4.15+esm3?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.19.6-1ubuntu4.15+esm3

Affected versions

2:1.*

2:1.19.5-0ubuntu2
2:1.19.6-1ubuntu1
2:1.19.6-1ubuntu2
2:1.19.6-1ubuntu3
2:1.19.6-1ubuntu4
2:1.19.6-1ubuntu4.1
2:1.19.6-1ubuntu4.2
2:1.19.6-1ubuntu4.3
2:1.19.6-1ubuntu4.4
2:1.19.6-1ubuntu4.5
2:1.19.6-1ubuntu4.6
2:1.19.6-1ubuntu4.7
2:1.19.6-1ubuntu4.8
2:1.19.6-1ubuntu4.9
2:1.19.6-1ubuntu4.10
2:1.19.6-1ubuntu4.11
2:1.19.6-1ubuntu4.12
2:1.19.6-1ubuntu4.13
2:1.19.6-1ubuntu4.14
2:1.19.6-1ubuntu4.15
2:1.19.6-1ubuntu4.15+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "xdmx",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xdmx-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xdmx-tools",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xdmx-tools-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xmir",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xmir-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xnest",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xnest-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xorg-server-source",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-common",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xephyr",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xephyr-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-core",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-core-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-core-udeb",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-dev",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-legacy",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-legacy-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xserver-xorg-xmir",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xvfb",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xvfb-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xwayland",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        },
        {
            "binary_name": "xwayland-dbgsym",
            "binary_version": "2:1.19.6-1ubuntu4.15+esm3"
        }
    ]
}