cnvd - cnvd-2020-03861

cnvd-2020-03861

Vulnerability from cnvd

Title: Knot Resolver拒绝服务漏洞

Description:

Knot Resolver是一款缓存DNS解析器实现，它包括解析器库和守护程序。

Knot Resolver中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。

Severity: 中

Patch Name: Knot Resolver拒绝服务漏洞的补丁

Patch Description:

Knot Resolver是一款缓存DNS解析器实现，它包括解析器库和守护程序。

Knot Resolver中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html

Reference: https://vigilance.fr/vulnerability/Knot-Resolver-denial-of-service-via-DNS-Replies-Many-RR-31146

Impacted products

Name
nlc Knot Resolver <4.3.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-19331"
    }
  },
  "description": "Knot Resolver\u662f\u4e00\u6b3e\u7f13\u5b58DNS\u89e3\u6790\u5668\u5b9e\u73b0\uff0c\u5b83\u5305\u62ec\u89e3\u6790\u5668\u5e93\u548c\u5b88\u62a4\u7a0b\u5e8f\u3002\n\nKnot Resolver\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-03861",
  "openTime": "2020-02-05",
  "patchDescription": "Knot Resolver\u662f\u4e00\u6b3e\u7f13\u5b58DNS\u89e3\u6790\u5668\u5b9e\u73b0\uff0c\u5b83\u5305\u62ec\u89e3\u6790\u5668\u5e93\u548c\u5b88\u62a4\u7a0b\u5e8f\u3002\r\n\r\nKnot Resolver\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Knot Resolver\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "nlc Knot Resolver \u003c4.3.0"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Knot-Resolver-denial-of-service-via-DNS-Replies-Many-RR-31146",
  "serverity": "\u4e2d",
  "submitTime": "2019-12-16",
  "title": "Knot Resolver\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2019-19331 (GCVE-0-2019-19331)

Vulnerability from cvelistv5

Published

2019-12-16 00:00

Modified

2024-08-05 02:16

Severity ?

7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-407

Summary

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331
	https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html
	https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html	mailing-list

Impacted products

	Vendor	Product	Version
	CZ.NIC	knot-resolver	Version: 4.3.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:16:46.880Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"
          },
          {
            "name": "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "knot-resolver",
          "vendor": "CZ.NIC",
          "versions": [
            {
              "status": "affected",
              "version": "4.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB)."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-04-26T07:06:04.638101",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"
        },
        {
          "url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"
        },
        {
          "name": "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2019-19331",
    "datePublished": "2019-12-16T00:00:00",
    "dateReserved": "2019-11-27T00:00:00",
    "dateUpdated": "2024-08-05T02:16:46.880Z",
    "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.

Action not permitted