USN-6555-2

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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
2025-10-13T04:36:43Z
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 

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

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-6377"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-6478"
            }
        ],
        "ecosystem": "Ubuntu:Pro:16.04:LTS"
    }
}

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 

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

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-6377"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-6478"
            }
        ],
        "ecosystem": "Ubuntu:Pro:18.04:LTS"
    }
}