Vulnerability-Lookup

CVE-2019-14834 (GCVE-0-2019-14834)

Vulnerability from cvelistv5 – Published: 2020-01-07 16:30 – Updated: 2024-08-05 00:26

Summary

A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation.

Severity

3.7 (Low)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-770

Assigner

redhat redhat root

References

3 references

URL	Tags
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
The Dnsmasq Project	dnsmasq	Affected: before 2.81	guessed

Show details on NVD website

JSON

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    "redhat_vex": {
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      "cve": "CVE-2019-14834",
      "id": "CVE-2019-14834",
      "initial_release_date": "2019-10-23T00:00:00+00:00",
      "product_status:fixed": "125",
      "product_status:known_affected": "7",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dnsmasq: memory leak in the create_helper() function in /src/helper.c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-14834.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-05T01:11:49Z",
      "cve": "CVE-2019-14834",
      "id": "CVE-2019-14834",
      "initial_release_date": "2023-02-15T04:09:27Z",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "1",
      "product_status:recommended": "96",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-14834",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-14834.json",
      "version": "27"
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}

WID-SEC-W-2023-0719

Vulnerability from csaf_certbund - Published: 2019-12-05 23:00 - Updated: 2025-08-11 22:00

Summary

dnsmasq: Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Dnsmasq ist ein leichtgewichtiger DNS- und DHCP Server.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in dnsmasq ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux

CVE-2019-14834

Affected products

Known affected 11 products

Product	Identifier	Version
Open Source dnsmasq <2.81 Open Source / dnsmasq		<2.81
Avaya Aura System Manager Avaya	`cpe:/a:avaya:aura_system_manager:-`	—
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—
Red Hat Enterprise Linux Red Hat	`cpe:/o:redhat:enterprise_linux:-`	—
Avaya Aura Application Enablement Services Avaya	`cpe:/a:avaya:aura_application_enablement_services:-`	—
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Avaya Aura Session Manager Avaya	`cpe:/a:avaya:session_manager:-`	—
Amazon Linux 2 Amazon	`cpe:/o:amazon:linux_2:-`	—
Avaya Aura Communication Manager Avaya	`cpe:/a:avaya:communication_manager:-`	—
Avaya Session Border Controller Avaya	`cpe:/h:avaya:session_border_controller:-`	—
Avaya Web License Manager Avaya	`cpe:/a:avaya:web_license_manager:-`	—

References

13 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
http://lists.suse.com/pipermail/sle-security-upda…	external
http://lists.suse.com/pipermail/sle-security-upda…	external
https://www.suse.com/support/update/announcement/…	external
https://access.redhat.com/errata/RHSA-2020:1715	external
https://access.redhat.com/errata/RHSA-2020:3878	external
https://downloads.avaya.com/css/P8/documents/101071744	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://usn.ubuntu.com/4698-1	external
https://ubuntu.com/security/notices/USN-4698-2	external
https://alas.aws.amazon.com/ALAS-2020-1458.html	external
https://ubuntu.com/security/notices/USN-7689-1	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Dnsmasq ist ein leichtgewichtiger DNS- und DHCP Server.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in dnsmasq ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2023-0719 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2019/wid-sec-w-2023-0719.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-0719 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0719"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2019:3188-1 vom 2019-12-05",
        "url": "http://lists.suse.com/pipermail/sle-security-updates/2019-December/006219.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2019:3189-1 vom 2019-12-05",
        "url": "http://lists.suse.com/pipermail/sle-security-updates/2019-December/006208.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2020:0419-1 vom 2020-02-19",
        "url": "https://www.suse.com/support/update/announcement/2020/suse-su-20200419-1.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2020:1715 vom 2020-04-28",
        "url": "https://access.redhat.com/errata/RHSA-2020:1715"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2020:3878 vom 2020-09-29",
        "url": "https://access.redhat.com/errata/RHSA-2020:3878"
      },
      {
        "category": "external",
        "summary": "AVAYA Security Advisory ASA-2020-114 vom 2020-10-25",
        "url": "https://downloads.avaya.com/css/P8/documents/101071744"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2021:14603-1 vom 2021-01-19",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2021-January/008224.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-4698-1 vom 2021-01-19",
        "url": "https://usn.ubuntu.com/4698-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-4698-2 vom 2021-02-24",
        "url": "https://ubuntu.com/security/notices/USN-4698-2"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2020-1458 vom 2023-03-23",
        "url": "https://alas.aws.amazon.com/ALAS-2020-1458.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-7689-1 vom 2025-08-12",
        "url": "https://ubuntu.com/security/notices/USN-7689-1"
      }
    ],
    "source_lang": "en-US",
    "title": "dnsmasq: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2025-08-11T22:00:00.000+00:00",
      "generator": {
        "date": "2025-08-12T07:47:07.736+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.4.0"
        }
      },
      "id": "WID-SEC-W-2023-0719",
      "initial_release_date": "2019-12-05T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2019-12-05T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2020-02-19T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2020-04-28T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2020-05-13T22:00:00.000+00:00",
          "number": "4",
          "summary": "Referenz(en) aufgenommen: FEDORA-2020-29B442F83E"
        },
        {
          "date": "2020-09-29T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2020-10-25T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von AVAYA aufgenommen"
        },
        {
          "date": "2021-01-19T23:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von SUSE und Ubuntu aufgenommen"
        },
        {
          "date": "2021-01-21T23:00:00.000+00:00",
          "number": "8",
          "summary": "Korrektur dnsmasq Version"
        },
        {
          "date": "2021-02-24T23:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2023-03-22T23:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2025-08-11T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        }
      ],
      "status": "final",
      "version": "11"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Avaya Aura Application Enablement Services",
            "product": {
              "name": "Avaya Aura Application Enablement Services",
              "product_id": "T015516",
              "product_identification_helper": {
                "cpe": "cpe:/a:avaya:aura_application_enablement_services:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Avaya Aura Communication Manager",
            "product": {
              "name": "Avaya Aura Communication Manager",
              "product_id": "T015126",
              "product_identification_helper": {
                "cpe": "cpe:/a:avaya:communication_manager:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Avaya Aura Session Manager",
            "product": {
              "name": "Avaya Aura Session Manager",
              "product_id": "T015127",
              "product_identification_helper": {
                "cpe": "cpe:/a:avaya:session_manager:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Avaya Aura System Manager",
            "product": {
              "name": "Avaya Aura System Manager",
              "product_id": "T015518",
              "product_identification_helper": {
                "cpe": "cpe:/a:avaya:aura_system_manager:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Avaya Session Border Controller",
            "product": {
              "name": "Avaya Session Border Controller",
              "product_id": "T015520",
              "product_identification_helper": {
                "cpe": "cpe:/h:avaya:session_border_controller:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Avaya Web License Manager",
            "product": {
              "name": "Avaya Web License Manager",
              "product_id": "T016243",
              "product_identification_helper": {
                "cpe": "cpe:/a:avaya:web_license_manager:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Avaya"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.81",
                "product": {
                  "name": "Open Source dnsmasq \u003c2.81",
                  "product_id": "T018148"
                }
              },
              {
                "category": "product_version",
                "name": "2.81",
                "product": {
                  "name": "Open Source dnsmasq 2.81",
                  "product_id": "T018148-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:dnsmasq:dnsmasq:2.81"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "dnsmasq"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2019-14834",
      "product_status": {
        "known_affected": [
          "T018148",
          "T015518",
          "T002207",
          "67646",
          "T015516",
          "T000126",
          "T015127",
          "398363",
          "T015126",
          "T015520",
          "T016243"
        ]
      },
      "release_date": "2019-12-05T23:00:00.000+00:00",
      "title": "CVE-2019-14834"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2019-14834 (GCVE-0-2019-14834)

WID-SEC-W-2023-0719

Tags

Sightings

Nomenclature