USN-4976-2

Petr Mensik discovered that Dnsmasq incorrectly randomized source ports in certain configurations. A remote attacker could possibly use this issue to facilitate DNS cache poisoning attacks.

References

Affected packages

Ubuntu:Pro:16.04:LTS / dnsmasq

Package

Name: dnsmasq
Purl: pkg:deb/ubuntu/dnsmasq@2.79-1ubuntu0.16.04.1+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.79-1ubuntu0.16.04.1+esm1

Affected versions

2.*

2.75-1

2.75-1ubuntu0.16.04.1

2.75-1ubuntu0.16.04.2

2.75-1ubuntu0.16.04.3

2.75-1ubuntu0.16.04.4

2.75-1ubuntu0.16.04.5

2.75-1ubuntu0.16.04.7

2.75-1ubuntu0.16.04.8

2.75-1ubuntu0.16.04.10

2.75-1ubuntu0.16.04.10+esm1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "2.79-1ubuntu0.16.04.1+esm1",
            "binary_name": "dnsmasq"
        },
        {
            "binary_version": "2.79-1ubuntu0.16.04.1+esm1",
            "binary_name": "dnsmasq-base"
        },
        {
            "binary_version": "2.79-1ubuntu0.16.04.1+esm1",
            "binary_name": "dnsmasq-base-lua"
        },
        {
            "binary_version": "2.79-1ubuntu0.16.04.1+esm1",
            "binary_name": "dnsmasq-utils"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ],
            "id": "CVE-2021-3448"
        }
    ]
}