USN-4547-2

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Source
https://ubuntu.com/security/notices/USN-4547-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4547-2.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-4547-2
Upstream
Related
Published
2020-09-28T19:52:43.588991Z
Modified
2025-10-13T04:35:15Z
Summary
ssvnc vulnerabilities
Details

It was discovered that the LibVNCClient vendored in SSVNC incorrectly handled certain packet lengths. A remote attacker could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code. (CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-2024)

References

Affected packages

Ubuntu:16.04:LTS / ssvnc

Package

Name
ssvnc
Purl
pkg:deb/ubuntu/ssvnc@1.0.29-2+deb8u1build0.16.04.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.0.29-2+deb8u1build0.16.04.1

Affected versions

1.*

1.0.29-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.29-2+deb8u1build0.16.04.1",
            "binary_name": "ssvnc"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2018-20020"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2018-20021"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2018-20022"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2018-20024"
        }
    ],
    "ecosystem": "Ubuntu:16.04:LTS"
}