Vulnerability-Lookup

CNVD-2020-38784

Vulnerability from cnvd - Published: 2020-07-14

Title

FreeBSD拒绝服务漏洞（CNVD-2020-38784）

Description

FreeBSD是由Core Team团队负责的FreeBSD项目中的一套类Unix自由操作系统，是经过BSD、386BSD和4.4BSD发展而来的类Unix的一个重要分支。 FreeBSD 11.1-STABLE之前版本、11.2-RELEASE-p2版本和11.1-RELEASE-p13版本中的ip碎片重组代码存在拒绝服务漏洞。远程攻击者可通过发送任意ip碎片利用该漏洞造成拒绝服务（资源耗尽）。

Severity

高

Patch Name

FreeBSD拒绝服务漏洞（CNVD-2020-38784）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： http://security.freebsd.org/advisories/FreeBSD-SA-18:10.ip.asc

Reference

https://securitytracker.com/id/1041505

Impacted products

Name
['FreeBSD FreeBSD <11.1-STABLE', 'FreeBSD Freebsd 11.2-RELEASE-p2', 'FreeBSD Freebsd 11.1-RELEASE-p13']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-6923"
    }
  },
  "description": "FreeBSD\u662f\u7531Core Team\u56e2\u961f\u8d1f\u8d23\u7684FreeBSD\u9879\u76ee\u4e2d\u7684\u4e00\u5957\u7c7bUnix\u81ea\u7531\u64cd\u4f5c\u7cfb\u7edf\uff0c\u662f\u7ecf\u8fc7BSD\u3001386BSD\u548c4.4BSD\u53d1\u5c55\u800c\u6765\u7684\u7c7bUnix\u7684\u4e00\u4e2a\u91cd\u8981\u5206\u652f\u3002\n\nFreeBSD 11.1-STABLE\u4e4b\u524d\u7248\u672c\u300111.2-RELEASE-p2\u7248\u672c\u548c11.1-RELEASE-p13\u7248\u672c\u4e2d\u7684ip\u788e\u7247\u91cd\u7ec4\u4ee3\u7801\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u4efb\u610fip\u788e\u7247\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u8d44\u6e90\u8017\u5c3d\uff09\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttp://security.freebsd.org/advisories/FreeBSD-SA-18:10.ip.asc",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-38784",
  "openTime": "2020-07-14",
  "patchDescription": "FreeBSD\u662f\u7531Core Team\u56e2\u961f\u8d1f\u8d23\u7684FreeBSD\u9879\u76ee\u4e2d\u7684\u4e00\u5957\u7c7bUnix\u81ea\u7531\u64cd\u4f5c\u7cfb\u7edf\uff0c\u662f\u7ecf\u8fc7BSD\u3001386BSD\u548c4.4BSD\u53d1\u5c55\u800c\u6765\u7684\u7c7bUnix\u7684\u4e00\u4e2a\u91cd\u8981\u5206\u652f\u3002\r\n\r\nFreeBSD 11.1-STABLE\u4e4b\u524d\u7248\u672c\u300111.2-RELEASE-p2\u7248\u672c\u548c11.1-RELEASE-p13\u7248\u672c\u4e2d\u7684ip\u788e\u7247\u91cd\u7ec4\u4ee3\u7801\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u4efb\u610fip\u788e\u7247\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u8d44\u6e90\u8017\u5c3d\uff09\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": "FreeBSD\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-38784\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "FreeBSD FreeBSD \u003c11.1-STABLE",
      "FreeBSD Freebsd 11.2-RELEASE-p2",
      "FreeBSD Freebsd 11.1-RELEASE-p13"
    ]
  },
  "referenceLink": "https://securitytracker.com/id/1041505",
  "serverity": "\u9ad8",
  "submitTime": "2018-08-17",
  "title": "FreeBSD\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-38784\uff09"
}

CVE-2018-6923 (GCVE-0-2018-6923)

Vulnerability from cvelistv5 – Published: 2018-09-04 18:00 – Updated: 2024-09-16 23:16

Summary

In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources.

Severity

No CVSS data available.

CWE

Denial of service

Assigner

freebsd mitre root

References

3 references

URL	Tags
http://www.securityfocus.com/bid/105336	vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1041505	vdb-entryx_refsource_SECTRACK
https://www.freebsd.org/security/advisories/FreeB…	vendor-advisoryx_refsource_FREEBSD

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: All supported versions of FreeBSD.

Date Public

2018-08-14 00:00

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T06:17:17.183Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "105336",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/105336"
          },
          {
            "name": "1041505",
            "tags": [
              "vdb-entry",
              "x_refsource_SECTRACK",
              "x_transferred"
            ],
            "url": "http://www.securitytracker.com/id/1041505"
          },
          {
            "name": "FreeBSD-SA-18:10",
            "tags": [
              "vendor-advisory",
              "x_refsource_FREEBSD",
              "x_transferred"
            ],
            "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "All supported versions of FreeBSD."
            }
          ]
        }
      ],
      "datePublic": "2018-08-14T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Denial of service",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2018-09-14T09:57:02.000Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "name": "105336",
          "tags": [
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            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/105336"
        },
        {
          "name": "1041505",
          "tags": [
            "vdb-entry",
            "x_refsource_SECTRACK"
          ],
          "url": "http://www.securitytracker.com/id/1041505"
        },
        {
          "name": "FreeBSD-SA-18:10",
          "tags": [
            "vendor-advisory",
            "x_refsource_FREEBSD"
          ],
          "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secteam@freebsd.org",
          "DATE_PUBLIC": "2018-08-14T00:00:00",
          "ID": "CVE-2018-6923",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "FreeBSD",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All supported versions of FreeBSD."
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "FreeBSD"
              }
            ]
          }
        },
        "data_format": "MITRE",
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        "data_version": "4.0",
        "description": {
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              "value": "In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources."
            }
          ]
        },
        "problemtype": {
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            {
              "description": [
                {
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                  "value": "Denial of service"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "105336",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/105336"
            },
            {
              "name": "1041505",
              "refsource": "SECTRACK",
              "url": "http://www.securitytracker.com/id/1041505"
            },
            {
              "name": "FreeBSD-SA-18:10",
              "refsource": "FREEBSD",
              "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2018-6923",
    "datePublished": "2018-09-04T18:00:00.000Z",
    "dateReserved": "2018-02-12T00:00:00.000Z",
    "dateUpdated": "2024-09-16T23:16:08.596Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2020-38784

CVE-2018-6923 (GCVE-0-2018-6923)

Tags

Sightings

Nomenclature

Related by attack behaviour