Vulnerability-Lookup

CNVD-2019-08723

Vulnerability from cnvd - Published: 2019-03-29

Title

pfSense访问限制绕过漏洞

Description

pfSense是一套基于FreeBSD Linux的网络防火墙。 pfSense 2.4.4_1版本中存在安全漏洞，该漏洞源于程序根据SSH身份验证失败的情况和HTTPS身份验证失败的情况来封锁源IP地址，但两者并不相符。攻击者可利用该漏洞绕过访问限制。

Severity

中

Patch Name

pfSense访问限制绕过漏洞的补丁

Patch Description

pfSense是一套基于FreeBSD Linux的网络防火墙。 pfSense 2.4.4_1版本中存在安全漏洞，该漏洞源于程序根据SSH身份验证失败的情况和HTTPS身份验证失败的情况来封锁源IP地址，但两者并不相符。攻击者可利用该漏洞绕过访问限制。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

厂商已发布漏洞修复程序，请及时关注更新： https://redmine.pfsense.org/attachments/2690/sshguad_by_service_filtering.patch

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-20799

Impacted products

Name
Pfsense pfSense 2.4.4_1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-20799"
    }
  },
  "description": "pfSense\u662f\u4e00\u5957\u57fa\u4e8eFreeBSD Linux\u7684\u7f51\u7edc\u9632\u706b\u5899\u3002\n\npfSense 2.4.4_1\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6839\u636eSSH\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\u7684\u60c5\u51b5\u548cHTTPS\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\u7684\u60c5\u51b5\u6765\u5c01\u9501\u6e90IP\u5730\u5740\uff0c\u4f46\u4e24\u8005\u5e76\u4e0d\u76f8\u7b26\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u8bbf\u95ee\u9650\u5236\u3002",
  "discovererName": "unKnow",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://redmine.pfsense.org/attachments/2690/sshguad_by_service_filtering.patch",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-08723",
  "openTime": "2019-03-29",
  "patchDescription": "pfSense\u662f\u4e00\u5957\u57fa\u4e8eFreeBSD Linux\u7684\u7f51\u7edc\u9632\u706b\u5899\u3002\r\n\r\npfSense 2.4.4_1\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6839\u636eSSH\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\u7684\u60c5\u51b5\u548cHTTPS\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\u7684\u60c5\u51b5\u6765\u5c01\u9501\u6e90IP\u5730\u5740\uff0c\u4f46\u4e24\u8005\u5e76\u4e0d\u76f8\u7b26\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u8bbf\u95ee\u9650\u5236\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": "pfSense\u8bbf\u95ee\u9650\u5236\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Pfsense pfSense 2.4.4_1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-20799",
  "serverity": "\u4e2d",
  "submitTime": "2019-03-04",
  "title": "pfSense\u8bbf\u95ee\u9650\u5236\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2018-20799 (GCVE-0-2018-20799)

Vulnerability from cvelistv5 – Published: 2019-03-01 15:00 – Updated: 2024-08-05 12:12

Summary

In pfSense 2.4.4_1, blocking of source IP addresses on the basis of failed HTTPS authentication is inconsistent with blocking of source IP addresses on the basis of failed SSH authentication (the behavior does not match the sshguard documentation), which might make it easier for attackers to bypass intended access restrictions.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://redmine.pfsense.org/issues/9223	x_refsource_MISC

Date Public

2019-03-01 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T12:12:27.107Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://redmine.pfsense.org/issues/9223"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2019-03-01T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In pfSense 2.4.4_1, blocking of source IP addresses on the basis of failed HTTPS authentication is inconsistent with blocking of source IP addresses on the basis of failed SSH authentication (the behavior does not match the sshguard documentation), which might make it easier for attackers to bypass intended access restrictions."
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-03-01T15:57:01.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://redmine.pfsense.org/issues/9223"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2018-20799",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
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              "lang": "eng",
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
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                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://redmine.pfsense.org/issues/9223",
              "refsource": "MISC",
              "url": "https://redmine.pfsense.org/issues/9223"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2018-20799",
    "datePublished": "2019-03-01T15:00:00.000Z",
    "dateReserved": "2019-03-01T00:00:00.000Z",
    "dateUpdated": "2024-08-05T12:12:27.107Z",
    "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.

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.
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.