USN-8110-1

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Source
https://ubuntu.com/security/notices/USN-8110-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8110-1
Upstream
Related
Published
2026-03-18T19:40:53Z
Modified
2026-05-20T16:03:58.871431366Z
Summary
libnet-cidr-perl vulnerability
Details

Dave Rolsky discovered that Net-CIDR did not properly sanitize IP addresses. An attacker could possibly use this to bypass IP-based restrictions.

References

Affected packages

Ubuntu:22.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.21-1ubuntu0.2

Affected versions

0.*
0.20-1
0.21-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.21-1ubuntu0.2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-4456"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"
Ubuntu:24.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.21-2ubuntu0.2

Affected versions

0.*
0.21-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.21-2ubuntu0.2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-4456"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"
Ubuntu:Pro:14.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.17-1ubuntu0.14.04.1~esm2

Affected versions

0.*
0.17-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.17-1ubuntu0.14.04.1~esm2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-4456"
        }
    ],
    "ecosystem": "Ubuntu:Pro:14.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"
Ubuntu:Pro:16.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.17-1ubuntu0.16.04.1~esm2

Affected versions

0.*
0.17-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.17-1ubuntu0.16.04.1~esm2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"
Ubuntu:Pro:18.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.18-1ubuntu0.1~esm2

Affected versions

0.*
0.18-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.18-1ubuntu0.1~esm2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-4456"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"
Ubuntu:Pro:20.04:LTS
libnet-cidr-perl

Package

Name
libnet-cidr-perl
Purl
pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.20-1ubuntu0.1~esm2

Affected versions

0.*
0.20-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.20-1ubuntu0.1~esm2",
            "binary_name": "libnet-cidr-perl"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-4456"
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"