UBUNTU-CVE-2018-21035

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Source
https://ubuntu.com/security/CVE-2018-21035
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-21035.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-21035
Upstream
Published
2020-02-28T21:15:00Z
Modified
2025-09-08T16:45:08Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (memory consumption).

References

Affected packages

Ubuntu:Pro:16.04:LTS / qtwebsockets-opensource-src

Package

Name
qtwebsockets-opensource-src
Purl
pkg:deb/ubuntu/qtwebsockets-opensource-src@5.5.1-4build1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.4.2-2build1
5.5.1-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "libqt5websockets5"
        },
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "libqt5websockets5-dev"
        },
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "qml-module-qt-websockets"
        },
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "qml-module-qtwebsockets"
        },
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "qtwebsockets5-doc-html"
        },
        {
            "binary_version": "5.5.1-4build1",
            "binary_name": "qtwebsockets5-examples"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / qtwebsockets-opensource-src

Package

Name
qtwebsockets-opensource-src
Purl
pkg:deb/ubuntu/qtwebsockets-opensource-src@5.9.5-0ubuntu1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.9.1-3
5.9.2-3build1
5.9.3-0ubuntu1
5.9.4-0ubuntu1
5.9.5-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "libqt5websockets5"
        },
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "libqt5websockets5-dev"
        },
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "qml-module-qt-websockets"
        },
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "qml-module-qtwebsockets"
        },
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "qtwebsockets5-doc-html"
        },
        {
            "binary_version": "5.9.5-0ubuntu1",
            "binary_name": "qtwebsockets5-examples"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / qtwebsockets-opensource-src

Package

Name
qtwebsockets-opensource-src
Purl
pkg:deb/ubuntu/qtwebsockets-opensource-src@5.12.8-0ubuntu1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.12.4-1
5.12.5-2
5.12.5-2build1
5.12.8-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "libqt5websockets5"
        },
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "libqt5websockets5-dev"
        },
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "qml-module-qt-websockets"
        },
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "qml-module-qtwebsockets"
        },
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "qtwebsockets5-doc-html"
        },
        {
            "binary_version": "5.12.8-0ubuntu1",
            "binary_name": "qtwebsockets5-examples"
        }
    ]
}