UBUNTU-CVE-2018-21247

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Source

https://ubuntu.com/security/CVE-2018-21247

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-21247.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-21247

Upstream

CVE-2018-21247

Published

2020-06-17T16:15:00Z

Modified

2025-09-08T16:45:08Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Ubuntu - low

Summary

[none]

Details

An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.

References

Affected packages

Ubuntu:Pro:14.04:LTS / x11vnc

Package

Name: x11vnc
Purl: pkg:deb/ubuntu/x11vnc@0.9.13-1.1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.13-1.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.13-1.1",
            "binary_name": "x11vnc"
        },
        {
            "binary_version": "0.9.13-1.1",
            "binary_name": "x11vnc-data"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / libvncserver

Package

Name: libvncserver
Purl: pkg:deb/ubuntu/libvncserver@0.9.10+dfsg-3ubuntu0.16.04.6?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.10+dfsg-3

0.9.10+dfsg-3build1

0.9.10+dfsg-3ubuntu0.16.04.1

0.9.10+dfsg-3ubuntu0.16.04.2

0.9.10+dfsg-3ubuntu0.16.04.3

0.9.10+dfsg-3ubuntu0.16.04.4

0.9.10+dfsg-3ubuntu0.16.04.5

0.9.10+dfsg-3ubuntu0.16.04.6

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.6",
            "binary_name": "libvncclient1"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.6",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.6",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.6",
            "binary_name": "libvncserver1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / x11vnc

Package

Name: x11vnc
Purl: pkg:deb/ubuntu/x11vnc@0.9.13-1.2ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.13-1.2build1

0.9.13-1.2ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.13-1.2ubuntu0.1~esm1",
            "binary_name": "x11vnc"
        },
        {
            "binary_version": "0.9.13-1.2ubuntu0.1~esm1",
            "binary_name": "x11vnc-data"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / libvncserver

Package

Name: libvncserver
Purl: pkg:deb/ubuntu/libvncserver@0.9.11+dfsg-1ubuntu1.4?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.11+dfsg-1

0.9.11+dfsg-1ubuntu1

0.9.11+dfsg-1ubuntu1.1

0.9.11+dfsg-1ubuntu1.2

0.9.11+dfsg-1ubuntu1.3

0.9.11+dfsg-1ubuntu1.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.4",
            "binary_name": "libvncclient1"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver1"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / x11vnc

Package

Name: x11vnc
Purl: pkg:deb/ubuntu/x11vnc@0.9.13-3ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.13-2

0.9.13-2build1

0.9.13-3

0.9.13-3ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.13-3ubuntu0.1~esm1",
            "binary_name": "x11vnc"
        },
        {
            "binary_version": "0.9.13-3ubuntu0.1~esm1",
            "binary_name": "x11vnc-data"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / libvncserver

Package

Name: libvncserver
Purl: pkg:deb/ubuntu/libvncserver@0.9.12+dfsg-9ubuntu0.3?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.11+dfsg-1.3

0.9.12+dfsg-3ubuntu3

0.9.12+dfsg-6

0.9.12+dfsg-7

0.9.12+dfsg-8

0.9.12+dfsg-9

0.9.12+dfsg-9ubuntu0.1

0.9.12+dfsg-9ubuntu0.2

0.9.12+dfsg-9ubuntu0.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.12+dfsg-9ubuntu0.3",
            "binary_name": "libvncclient1"
        },
        {
            "binary_version": "0.9.12+dfsg-9ubuntu0.3",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.12+dfsg-9ubuntu0.3",
            "binary_name": "libvncserver1"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / veyon

Package

Name: veyon
Purl: pkg:deb/ubuntu/veyon@4.3.1+repack1-2build2?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.2.4+repack1-2

4.2.5+repack1-1

4.3.1+repack1-1

4.3.1+repack1-2

4.3.1+repack1-2build1

4.3.1+repack1-2build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "4.3.1+repack1-2build2",
            "binary_name": "libveyon-core"
        },
        {
            "binary_version": "4.3.1+repack1-2build2",
            "binary_name": "veyon-configurator"
        },
        {
            "binary_version": "4.3.1+repack1-2build2",
            "binary_name": "veyon-master"
        },
        {
            "binary_version": "4.3.1+repack1-2build2",
            "binary_name": "veyon-plugins"
        },
        {
            "binary_version": "4.3.1+repack1-2build2",
            "binary_name": "veyon-service"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / x11vnc

Package

Name: x11vnc
Purl: pkg:deb/ubuntu/x11vnc@0.9.16-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.13-6

0.9.16-3

0.9.16-3ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.16-3ubuntu0.1~esm1",
            "binary_name": "x11vnc"
        }
    ]
}

Ubuntu:22.04:LTS / veyon

Package

Name: veyon
Purl: pkg:deb/ubuntu/veyon@4.5.3+repack1-1build2?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.3+repack1-1build1

4.5.3+repack1-1build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "4.5.3+repack1-1build2",
            "binary_name": "libveyon-core"
        },
        {
            "binary_version": "4.5.3+repack1-1build2",
            "binary_name": "veyon-configurator"
        },
        {
            "binary_version": "4.5.3+repack1-1build2",
            "binary_name": "veyon-master"
        },
        {
            "binary_version": "4.5.3+repack1-1build2",
            "binary_name": "veyon-plugins"
        },
        {
            "binary_version": "4.5.3+repack1-1build2",
            "binary_name": "veyon-service"
        }
    ]
}

Ubuntu:24.04:LTS / veyon

Package

Name: veyon
Purl: pkg:deb/ubuntu/veyon@4.7.5+repack1-1ubuntu5?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.7.5+repack1-1build2

4.7.5+repack1-1ubuntu1

4.7.5+repack1-1ubuntu3

4.7.5+repack1-1ubuntu4

4.7.5+repack1-1ubuntu5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "4.7.5+repack1-1ubuntu5",
            "binary_name": "libveyon-core"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu5",
            "binary_name": "veyon-configurator"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu5",
            "binary_name": "veyon-master"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu5",
            "binary_name": "veyon-plugins"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu5",
            "binary_name": "veyon-service"
        }
    ]
}

Ubuntu:25.04 / veyon

Package

Name: veyon
Purl: pkg:deb/ubuntu/veyon@4.7.5+repack1-1ubuntu6?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.7.5+repack1-1ubuntu6

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "4.7.5+repack1-1ubuntu6",
            "binary_name": "libveyon-core"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu6",
            "binary_name": "veyon-configurator"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu6",
            "binary_name": "veyon-master"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu6",
            "binary_name": "veyon-plugins"
        },
        {
            "binary_version": "4.7.5+repack1-1ubuntu6",
            "binary_name": "veyon-service"
        }
    ]
}