UBUNTU-CVE-2018-20023

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Source
https://ubuntu.com/security/CVE-2018-20023
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20023.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2018-20023
Related
Published
2018-12-19T00:00:00Z
Modified
2025-05-26T16:40:38Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

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 

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

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 

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

Ubuntu:16.04:LTS / 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 

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

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 

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

Ubuntu:18.04:LTS / 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 

{
    "ubuntu_priority": "medium",
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libvncclient1",
            "binary_version": "0.9.11+dfsg-1ubuntu1.1"
        },
        {
            "binary_name": "libvncclient1-dbg",
            "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",
            "binary_version": "0.9.11+dfsg-1ubuntu1.1"
        },
        {
            "binary_name": "libvncserver1-dbg",
            "binary_version": "0.9.11+dfsg-1ubuntu1.1"
        }
    ]
}