USN-6657-1

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Source
https://ubuntu.com/security/notices/USN-6657-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6657-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-6657-1
Upstream
Related
Published
2024-02-26T13:52:13.956982Z
Modified
2025-10-13T04:36:47Z
Summary
dnsmasq vulnerabilities
Details

Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Dnsmasq icorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50387)

It was discovered that Dnsmasq incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50868)

It was discovered that Dnsmasq incorrectly set the maximum EDNS.0 UDP packet size as required by DNS Flag Day 2020. This issue only affected Ubuntu 23.10. (CVE-2023-28450)

References

Affected packages

Ubuntu:20.04:LTS / dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/ubuntu/dnsmasq@2.90-0ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.90-0ubuntu0.20.04.1

Affected versions

2.*

2.80-1ubuntu2
2.80-1ubuntu4
2.80-1.1ubuntu1
2.80-1.1ubuntu1.2
2.80-1.1ubuntu1.3
2.80-1.1ubuntu1.4
2.80-1.1ubuntu1.5
2.80-1.1ubuntu1.6
2.80-1.1ubuntu1.7

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.90-0ubuntu0.20.04.1",
            "binary_name": "dnsmasq"
        },
        {
            "binary_version": "2.90-0ubuntu0.20.04.1",
            "binary_name": "dnsmasq-base"
        },
        {
            "binary_version": "2.90-0ubuntu0.20.04.1",
            "binary_name": "dnsmasq-base-lua"
        },
        {
            "binary_version": "2.90-0ubuntu0.20.04.1",
            "binary_name": "dnsmasq-utils"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2023-50387",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2023-50868",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}

Ubuntu:22.04:LTS / dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/ubuntu/dnsmasq@2.90-0ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.90-0ubuntu0.22.04.1

Affected versions

2.*

2.85-1ubuntu2
2.86-1.1
2.86-1.1ubuntu0.1
2.86-1.1ubuntu0.2
2.86-1.1ubuntu0.3
2.86-1.1ubuntu0.4
2.86-1.1ubuntu0.5

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.90-0ubuntu0.22.04.1",
            "binary_name": "dnsmasq"
        },
        {
            "binary_version": "2.90-0ubuntu0.22.04.1",
            "binary_name": "dnsmasq-base"
        },
        {
            "binary_version": "2.90-0ubuntu0.22.04.1",
            "binary_name": "dnsmasq-base-lua"
        },
        {
            "binary_version": "2.90-0ubuntu0.22.04.1",
            "binary_name": "dnsmasq-utils"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2023-50387",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2023-50868",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}