cnvd - cnvd-2021-19770

cnvd-2021-19770

Vulnerability from cnvd

Title: Dnsmasq访问控制错误漏洞

Description:

Dnsmasq是一款使用C语言编写的轻量级DNS转发和DHCP、TFTP服务器。

Dnsmasq（Fedora和Red Hat Enterprise Linux）中的默认配置存在访问控制错误漏洞。该漏洞源于网络系统或产品未正确限制来自未授权角色的资源访问。攻击者可以利用该漏洞对其他系统进行分布式拒绝服务（DDoS）。

Severity: 中

Formal description:

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法： http://www.thekelleys.org.uk/dnsmasq/doc.html

Reference: https://access.redhat.com/security/cve/cve-2020-14312

Impacted products

Name
Dnsmasq Dnsmasq <31

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-14312"
    }
  },
  "description": "Dnsmasq\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u8f7b\u91cf\u7ea7DNS\u8f6c\u53d1\u548cDHCP\u3001TFTP\u670d\u52a1\u5668\u3002\n\nDnsmasq\uff08Fedora\u548cRed Hat Enterprise Linux\uff09\u4e2d\u7684\u9ed8\u8ba4\u914d\u7f6e\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u672a\u6b63\u786e\u9650\u5236\u6765\u81ea\u672a\u6388\u6743\u89d2\u8272\u7684\u8d44\u6e90\u8bbf\u95ee\u3002 \u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u5bf9\u5176\u4ed6\u7cfb\u7edf\u8fdb\u884c\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\uff08DDoS\uff09\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\nhttp://www.thekelleys.org.uk/dnsmasq/doc.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-19770",
  "openTime": "2021-03-22",
  "products": {
    "product": "Dnsmasq Dnsmasq \u003c31"
  },
  "referenceLink": "https://access.redhat.com/security/cve/cve-2020-14312",
  "serverity": "\u4e2d",
  "submitTime": "2020-07-02",
  "title": "Dnsmasq\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-14312 (GCVE-0-2020-14312)

Vulnerability from cvelistv5

Published

2021-02-05 23:16

Modified

2024-08-04 12:39

Severity ?

CWE

CWE-284

Summary

A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option `local-service` is not enabled. Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1851342	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	dnsmasq	Version: Fedora version prior to 31 Version: all RHEL versions

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:39:36.268Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1851342"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "dnsmasq",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fedora version prior to 31"
            },
            {
              "status": "affected",
              "version": "all RHEL versions"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all versions Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option `local-service` is not enabled. Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-05T23:16:33",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1851342"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2020-14312",
    "datePublished": "2021-02-05T23:16:33",
    "dateReserved": "2020-06-17T00:00:00",
    "dateUpdated": "2024-08-04T12:39:36.268Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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