Vulnerability-Lookup

CNVD-2021-31747

Vulnerability from cnvd - Published: 2021-04-29

Title

OpenVPN认证绕过漏洞

Description

Openvpn OpenVPN是美国OpenVPN公司的一个用于创建虚拟专用网络（VPN）加密通道的软件包，它使用OpenSSL库来加密数据与控制信息，并允许创建的VPN使用公开密钥、电子证书或者用户名/密码来进行身份验证。 OpenVPN 2.5.1版本及之前版本存在安全漏洞，远程攻击者可利用该漏洞绕过配置了延迟认证的服务器上的认证和访问控制通道数据。

Severity

高

Patch Name

OpenVPN认证绕过漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://community.openvpn.net/openvpn/wiki/CVE-2020-15078

Reference

https://vigilance.fr/vulnerability/OpenVPN-information-disclosure-via-Deferred-Authentication-35147

Impacted products

Name
OpenVPN Openvpn <=2.5.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-15078",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-15078"
    }
  },
  "description": "Openvpn OpenVPN\u662f\u7f8e\u56fdOpenVPN\u516c\u53f8\u7684\u4e00\u4e2a\u7528\u4e8e\u521b\u5efa\u865a\u62df\u4e13\u7528\u7f51\u7edc\uff08VPN\uff09\u52a0\u5bc6\u901a\u9053\u7684\u8f6f\u4ef6\u5305\uff0c\u5b83\u4f7f\u7528OpenSSL\u5e93\u6765\u52a0\u5bc6\u6570\u636e\u4e0e\u63a7\u5236\u4fe1\u606f\uff0c\u5e76\u5141\u8bb8\u521b\u5efa\u7684VPN\u4f7f\u7528\u516c\u5f00\u5bc6\u94a5\u3001\u7535\u5b50\u8bc1\u4e66\u6216\u8005\u7528\u6237\u540d/\u5bc6\u7801\u6765\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u3002\n\nOpenVPN 2.5.1\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u914d\u7f6e\u4e86\u5ef6\u8fdf\u8ba4\u8bc1\u7684\u670d\u52a1\u5668\u4e0a\u7684\u8ba4\u8bc1\u548c\u8bbf\u95ee\u63a7\u5236\u901a\u9053\u6570\u636e\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://community.openvpn.net/openvpn/wiki/CVE-2020-15078",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-31747",
  "openTime": "2021-04-29",
  "patchDescription": "Openvpn OpenVPN\u662f\u7f8e\u56fdOpenVPN\u516c\u53f8\u7684\u4e00\u4e2a\u7528\u4e8e\u521b\u5efa\u865a\u62df\u4e13\u7528\u7f51\u7edc\uff08VPN\uff09\u52a0\u5bc6\u901a\u9053\u7684\u8f6f\u4ef6\u5305\uff0c\u5b83\u4f7f\u7528OpenSSL\u5e93\u6765\u52a0\u5bc6\u6570\u636e\u4e0e\u63a7\u5236\u4fe1\u606f\uff0c\u5e76\u5141\u8bb8\u521b\u5efa\u7684VPN\u4f7f\u7528\u516c\u5f00\u5bc6\u94a5\u3001\u7535\u5b50\u8bc1\u4e66\u6216\u8005\u7528\u6237\u540d/\u5bc6\u7801\u6765\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u3002\r\n\r\nOpenVPN 2.5.1\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u914d\u7f6e\u4e86\u5ef6\u8fdf\u8ba4\u8bc1\u7684\u670d\u52a1\u5668\u4e0a\u7684\u8ba4\u8bc1\u548c\u8bbf\u95ee\u63a7\u5236\u901a\u9053\u6570\u636e\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": "OpenVPN\u8ba4\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "OpenVPN Openvpn \u003c=2.5.1"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/OpenVPN-information-disclosure-via-Deferred-Authentication-35147",
  "serverity": "\u9ad8",
  "submitTime": "2021-04-27",
  "title": "OpenVPN\u8ba4\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2020-15078 (GCVE-0-2020-15078)

Vulnerability from cvelistv5 – Published: 2021-04-26 13:19 – Updated: 2024-08-04 13:08

Summary

OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.

Severity

No CVSS data available.

CWE

CWE-305 - Authentication Bypass by Primary Weakness

Assigner

OpenVPN mitre root

References

8 references

URL	Tags
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://community.openvpn.net/openvpn/wiki/CVE-20…	x_refsource_MISC
https://community.openvpn.net/openvpn/wiki/Securi…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202105-25	vendor-advisoryx_refsource_GENTOO
https://usn.ubuntu.com/usn/usn-4933-1	vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
n/a	OpenVPN	Affected: 2.5.1 and earlier versions

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:08:21.675Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "FEDORA-2021-242ef81244",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/"
          },
          {
            "name": "FEDORA-2021-b805c26afa",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://community.openvpn.net/openvpn/wiki/CVE-2020-15078"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
          },
          {
            "name": "FEDORA-2021-d6b9d8497b",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/"
          },
          {
            "name": "GLSA-202105-25",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202105-25"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/usn/usn-4933-1"
          },
          {
            "name": "[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "OpenVPN",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.5.1 and earlier versions"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-305",
              "description": "CWE-305: Authentication Bypass by Primary Weakness",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-05-03T13:06:09.000Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "name": "FEDORA-2021-242ef81244",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/"
        },
        {
          "name": "FEDORA-2021-b805c26afa",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://community.openvpn.net/openvpn/wiki/CVE-2020-15078"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
        },
        {
          "name": "FEDORA-2021-d6b9d8497b",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/"
        },
        {
          "name": "GLSA-202105-25",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202105-25"
        },
        {
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/usn/usn-4933-1"
        },
        {
          "name": "[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@openvpn.net",
          "ID": "CVE-2020-15078",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "OpenVPN",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "2.5.1 and earlier versions"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-305: Authentication Bypass by Primary Weakness"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "FEDORA-2021-242ef81244",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/"
            },
            {
              "name": "FEDORA-2021-b805c26afa",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/"
            },
            {
              "name": "https://community.openvpn.net/openvpn/wiki/CVE-2020-15078",
              "refsource": "MISC",
              "url": "https://community.openvpn.net/openvpn/wiki/CVE-2020-15078"
            },
            {
              "name": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements",
              "refsource": "MISC",
              "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
            },
            {
              "name": "FEDORA-2021-d6b9d8497b",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/"
            },
            {
              "name": "GLSA-202105-25",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202105-25"
            },
            {
              "name": "https://usn.ubuntu.com/usn/usn-4933-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/usn/usn-4933-1"
            },
            {
              "name": "[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2020-15078",
    "datePublished": "2021-04-26T13:19:45.000Z",
    "dateReserved": "2020-06-25T00:00:00.000Z",
    "dateUpdated": "2024-08-04T13:08:21.675Z",
    "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.