USN-8024-1

Raffaele Bova discovered that Libwebsockets incorrectly handled memory when the upgrade header is not valid in the WebSocket server. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-11677)

Raffaele Bova discovered that Libwebsockets did not properly check the size of the destination buffer in the async-dns component. An attacker could possibly use this issue to cause applications to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-11678)

References

Affected packages

Ubuntu:Pro:20.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@3.2.1-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.2.1-3ubuntu0.1~esm1

Affected versions

2.*

2.0.3-3build1

3.*

3.2.1-3

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.2.1-3ubuntu0.1~esm1",
            "binary_name": "libwebsockets-test-server"
        },
        {
            "binary_version": "3.2.1-3ubuntu0.1~esm1",
            "binary_name": "libwebsockets-test-server-common"
        },
        {
            "binary_version": "3.2.1-3ubuntu0.1~esm1",
            "binary_name": "libwebsockets15"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8024-1.json"

cves_map

{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-11677",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:22.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@4.0.20-2ubuntu1.1?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.0.20-2ubuntu1.1

Affected versions

4.*

4.0.20-2

4.0.20-2ubuntu1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.0.20-2ubuntu1.1",
            "binary_name": "libwebsockets-test-server"
        },
        {
            "binary_version": "4.0.20-2ubuntu1.1",
            "binary_name": "libwebsockets-test-server-common"
        },
        {
            "binary_version": "4.0.20-2ubuntu1.1",
            "binary_name": "libwebsockets16"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8024-1.json"

cves_map

{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-11677",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2025-11678",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:24.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@4.3.3-1.1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.3.3-1.1ubuntu0.1~esm1

Affected versions

4.*

4.3.2-4

4.3.3-1

4.3.3-1.1build1

4.3.3-1.1build2

4.3.3-1.1build3

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets-evlib-ev"
        },
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets-evlib-glib"
        },
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets-evlib-uv"
        },
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets-test-server"
        },
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets-test-server-common"
        },
        {
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1",
            "binary_name": "libwebsockets19t64"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8024-1.json"

cves_map

{
    "ecosystem": "Ubuntu:Pro:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-11677",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2025-11678",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}