USN-6407-2

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Source
https://ubuntu.com/security/notices/USN-6407-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6407-2.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-6407-2
Upstream
Related
Published
2023-10-10T14:35:08.561915Z
Modified
2025-10-13T04:36:37Z
Summary
libx11 vulnerabilities
Details

USN-6407-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-43785)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service. (CVE-2023-43786)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could use this issue to cause libx11 to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-43787)

References

Affected packages

Ubuntu:Pro:14.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1+esm5?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.2-1ubuntu2.1+esm5

Affected versions

2:1.*

2:1.6.1-1ubuntu1
2:1.6.1-1ubuntu2
2:1.6.2-1ubuntu1
2:1.6.2-1ubuntu2
2:1.6.2-1ubuntu2.1
2:1.6.2-1ubuntu2.1+esm1
2:1.6.2-1ubuntu2.1+esm2
2:1.6.2-1ubuntu2.1+esm3
2:1.6.2-1ubuntu2.1+esm4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm5"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm5"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm5"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm5"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm5"
        }
    ]
}

Database specific 

{
    "cves_map": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43785"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43786"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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-2023-43787"
            }
        ]
    }
}

Ubuntu:Pro:16.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2+esm4?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.3-1ubuntu2.2+esm4

Affected versions

2:1.*

2:1.6.3-1ubuntu2
2:1.6.3-1ubuntu2.1
2:1.6.3-1ubuntu2.2
2:1.6.3-1ubuntu2.2+esm1
2:1.6.3-1ubuntu2.2+esm2
2:1.6.3-1ubuntu2.2+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.3-1ubuntu2.2+esm4"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.3-1ubuntu2.2+esm4"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.3-1ubuntu2.2+esm4"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.3-1ubuntu2.2+esm4"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.3-1ubuntu2.2+esm4"
        }
    ]
}

Database specific 

{
    "cves_map": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43785"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43786"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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-2023-43787"
            }
        ]
    }
}

Ubuntu:Pro:18.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.4+esm2?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.4-3ubuntu0.4+esm2

Affected versions

2:1.*

2:1.6.4-3
2:1.6.4-3ubuntu0.1
2:1.6.4-3ubuntu0.2
2:1.6.4-3ubuntu0.3
2:1.6.4-3ubuntu0.4
2:1.6.4-3ubuntu0.4+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.4-3ubuntu0.4+esm2"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.4-3ubuntu0.4+esm2"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.4-3ubuntu0.4+esm2"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.4-3ubuntu0.4+esm2"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.4-3ubuntu0.4+esm2"
        }
    ]
}

Database specific 

{
    "cves_map": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43785"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2023-43786"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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-2023-43787"
            }
        ]
    }
}