UBUNTU-CVE-2020-19861

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Source
https://ubuntu.com/security/CVE-2020-19861
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-19861.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-19861
Upstream
Downstream
Related
Published
2022-01-21T15:15:00Z
Modified
2025-07-16T07:34:10.153672Z
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 - medium
Summary
[none]
Details

When a zone file in ldns 1.7.1 is parsed, the function ldnsnsec3saltdata is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldnsrdfsize(saltrdf) byte data can be copied, causing heap overflow information leakage.

References

Affected packages

Ubuntu:Pro:16.04:LTS / ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns@1.6.17-8ubuntu0.1+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.17-8ubuntu0.1+esm1

Affected versions

1.*

1.6.17-5
1.6.17-7
1.6.17-8
1.6.17-8ubuntu0.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "ldnsutils-dbgsym",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "libldns-dev",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "libldns-dev-dbgsym",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "libldns1",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "libldns1-dbg",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "libldns1-dbgsym",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.6.17-8ubuntu0.1+esm1"
        }
    ]
}

Ubuntu:18.04:LTS / ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns@1.7.0-3ubuntu4.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.0-3ubuntu4.1

Affected versions

1.*

1.7.0-1ubuntu1
1.7.0-3ubuntu1
1.7.0-3ubuntu2
1.7.0-3ubuntu4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "ldnsutils-dbgsym",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "libldns-dev",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "libldns2",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "libldns2-dbgsym",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "python-ldns-dbgsym",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.0-3ubuntu4.1"
        },
        {
            "binary_name": "python3-ldns-dbgsym",
            "binary_version": "1.7.0-3ubuntu4.1"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns@1.7.0-4.1ubuntu1+esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.0-4.1ubuntu1+esm1

Affected versions

1.*

1.7.0-3ubuntu8
1.7.0-4
1.7.0-4ubuntu1
1.7.0-4.1ubuntu1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "ldnsutils-dbgsym",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "libldns-dev",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "libldns2",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "libldns2-dbgsym",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "python-ldns-dbgsym",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        },
        {
            "binary_name": "python3-ldns-dbgsym",
            "binary_version": "1.7.0-4.1ubuntu1+esm1"
        }
    ]
}

Ubuntu:22.04:LTS / ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns@1.7.1-2ubuntu4?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*

1.7.1-2build1
1.7.1-2ubuntu1
1.7.1-2ubuntu3
1.7.1-2ubuntu4

Ubuntu:Pro:22.04:LTS / ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns@1.7.1-2ubuntu4+esm1?arch=source&distro=esm-apps/jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.1-2ubuntu4+esm1

Affected versions

1.*

1.7.1-2build1
1.7.1-2ubuntu1
1.7.1-2ubuntu3
1.7.1-2ubuntu4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "ldnsutils-dbgsym",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "libldns-dev",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "libldns3",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "libldns3-dbgsym",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        },
        {
            "binary_name": "python3-ldns-dbgsym",
            "binary_version": "1.7.1-2ubuntu4+esm1"
        }
    ]
}