UBUNTU-CVE-2018-20748

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2018-20748
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20748.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-20748
Upstream
Downstream
Related
Published
2019-01-30T00:00:00Z
Modified
2025-10-24T04:47:19Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.

References

Affected packages

Ubuntu:14.04:LTS

libvncserver

Package

Name
libvncserver
Purl
pkg:deb/ubuntu/libvncserver@0.9.9+dfsg-1ubuntu1.4?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.9+dfsg-1ubuntu1.4

Affected versions

0.*

0.9.9+dfsg-1
0.9.9+dfsg-1ubuntu1
0.9.9+dfsg-1ubuntu1.1
0.9.9+dfsg-1ubuntu1.2
0.9.9+dfsg-1ubuntu1.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.4",
            "binary_name": "libvncserver0"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.4",
            "binary_name": "linuxvnc"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:16.04:LTS

italc

Package

Name
italc
Purl
pkg:deb/ubuntu/italc@1:2.0.2+dfsg1-4ubuntu0.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.0.2+dfsg1-4ubuntu0.1

Affected versions

1:2.*

1:2.0.2+dfsg1-3
1:2.0.2+dfsg1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:2.0.2+dfsg1-4ubuntu0.1",
            "binary_name": "italc-client"
        },
        {
            "binary_version": "1:2.0.2+dfsg1-4ubuntu0.1",
            "binary_name": "italc-management-console"
        },
        {
            "binary_version": "1:2.0.2+dfsg1-4ubuntu0.1",
            "binary_name": "italc-master"
        },
        {
            "binary_version": "1:2.0.2+dfsg1-4ubuntu0.1",
            "binary_name": "libitalccore"
        }
    ],
    "availability": "No subscription required"
}

libvncserver

Package

Name
libvncserver
Purl
pkg:deb/ubuntu/libvncserver@0.9.10+dfsg-3ubuntu0.16.04.3?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.10+dfsg-3ubuntu0.16.04.3

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.3",
            "binary_name": "libvncclient1"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.3",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.3",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.10+dfsg-3ubuntu0.16.04.3",
            "binary_name": "libvncserver1"
        }
    ],
    "availability": "No subscription required"
}

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1.3.10-0ubuntu3?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*

1.3.10-0ubuntu2
1.3.10-0ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-0ubuntu3",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1.3.10-0ubuntu3",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:18.04:LTS

italc

Package

Name
italc
Purl
pkg:deb/ubuntu/italc@1:3.0.3+dfsg1-3ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:3.0.3+dfsg1-3ubuntu0.1

Affected versions

1:3.*

1:3.0.3+dfsg1-1
1:3.0.3+dfsg1-2
1:3.0.3+dfsg1-2build1
1:3.0.3+dfsg1-2ubuntu1
1:3.0.3+dfsg1-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:3.0.3+dfsg1-3ubuntu0.1",
            "binary_name": "italc-client"
        },
        {
            "binary_version": "1:3.0.3+dfsg1-3ubuntu0.1",
            "binary_name": "italc-management-console"
        },
        {
            "binary_version": "1:3.0.3+dfsg1-3ubuntu0.1",
            "binary_name": "italc-master"
        },
        {
            "binary_version": "1:3.0.3+dfsg1-3ubuntu0.1",
            "binary_name": "libitalccore"
        }
    ],
    "availability": "No subscription required"
}

libvncserver

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.11+dfsg-1ubuntu1.1

Affected versions

0.*

0.9.11+dfsg-1
0.9.11+dfsg-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.1",
            "binary_name": "libvncclient1"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.11+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver1"
        }
    ],
    "availability": "No subscription required"
}

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1.3.10-0ubuntu4?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*

1.3.10-0ubuntu3
1.3.10-0ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-0ubuntu4",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1.3.10-0ubuntu4",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:20.04:LTS

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1.3.10-0ubuntu5?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*

1.3.10-0ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-0ubuntu5",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1.3.10-0ubuntu5",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:22.04:LTS

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1:1.3.10-5?arch=source&distro=jammy

Affected ranges

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

Affected versions

1:1.*

1:1.3.10-3
1:1.3.10-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:1.3.10-5",
            "binary_name": "tightvncpasswd"
        },
        {
            "binary_version": "1:1.3.10-5",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1:1.3.10-5",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:24.04:LTS

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1:1.3.10-8?arch=source&distro=noble

Affected ranges

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

Affected versions

1:1.*

1:1.3.10-7
1:1.3.10-7build1
1:1.3.10-7build2
1:1.3.10-8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:1.3.10-8",
            "binary_name": "tightvncpasswd"
        },
        {
            "binary_version": "1:1.3.10-8",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1:1.3.10-8",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:25.04

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1:1.3.10-9?arch=source&distro=plucky

Affected ranges

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

Affected versions

1:1.*

1:1.3.10-9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:1.3.10-9",
            "binary_name": "tightvncpasswd"
        },
        {
            "binary_version": "1:1.3.10-9",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1:1.3.10-9",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:25.10

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1:1.3.10-10?arch=source&distro=questing

Affected ranges

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

Affected versions

1:1.*

1:1.3.10-9
1:1.3.10-10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:1.3.10-10",
            "binary_name": "tightvncpasswd"
        },
        {
            "binary_version": "1:1.3.10-10",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1:1.3.10-10",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Ubuntu:Pro:14.04:LTS

tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1.3.9-6.5+deb8u1build0.14.04.1~esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.9-6.5+deb8u1build0.14.04.1~esm1

Affected versions

1.*

1.3.9-6.4
1.3.9-6.4ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.9-6.5+deb8u1build0.14.04.1~esm1",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1.3.9-6.5+deb8u1build0.14.04.1~esm1",
            "binary_name": "xtightvncviewer"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}