Vulnerability-Lookup

CNVD-2021-49155

Vulnerability from cnvd - Published: 2021-07-11

Title

OpenVPN存在未明漏洞（CNVD-2021-49155）

Description

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在Windows上存在安全漏洞，该漏洞源于OpenVPN允许本地用户通过OpenSSL配置文件加载任意动态可加载库。攻击者可利用漏洞允许用户以与主OpenVPN进程(OpenVPN .exe)相同的权限级别运行任意代码。

Severity

中

Patch Name

OpenVPN存在未明漏洞（CNVD-2021-49155）的补丁

Patch Description

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://community.openvpn.net/openvpn/wiki/CVE-2021-3606

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-3606

Impacted products

Name
OpenVPN Openvpn <2.5.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-3606"
    }
  },
  "description": "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\u5728Windows\u4e0a\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eOpenVPN\u5141\u8bb8\u672c\u5730\u7528\u6237\u901a\u8fc7OpenSSL\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u4efb\u610f\u52a8\u6001\u53ef\u52a0\u8f7d\u5e93\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u5141\u8bb8\u7528\u6237\u4ee5\u4e0e\u4e3bOpenVPN\u8fdb\u7a0b(OpenVPN .exe)\u76f8\u540c\u7684\u6743\u9650\u7ea7\u522b\u8fd0\u884c\u4efb\u610f\u4ee3\u7801\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://community.openvpn.net/openvpn/wiki/CVE-2021-3606",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-49155",
  "openTime": "2021-07-11",
  "patchDescription": "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\u5728Windows\u4e0a\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eOpenVPN\u5141\u8bb8\u672c\u5730\u7528\u6237\u901a\u8fc7OpenSSL\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u4efb\u610f\u52a8\u6001\u53ef\u52a0\u8f7d\u5e93\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u5141\u8bb8\u7528\u6237\u4ee5\u4e0e\u4e3bOpenVPN\u8fdb\u7a0b(OpenVPN .exe)\u76f8\u540c\u7684\u6743\u9650\u7ea7\u522b\u8fd0\u884c\u4efb\u610f\u4ee3\u7801\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\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-49155\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "OpenVPN Openvpn \u003c2.5.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-3606",
  "serverity": "\u4e2d",
  "submitTime": "2021-07-05",
  "title": "OpenVPN\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-49155\uff09"
}

CVE-2021-3606 (GCVE-0-2021-3606)

Vulnerability from cvelistv5 – Published: 2021-07-02 12:30 – Updated: 2024-08-03 17:01

Summary

OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe).

Severity

No CVSS data available.

CWE

CWE-427 - Uncontrolled Search Path Element

Assigner

OpenVPN mitre root

References

2 references

URL	Tags
https://community.openvpn.net/openvpn/wiki/Securi…	x_refsource_MISC
https://community.openvpn.net/openvpn/wiki/CVE-20…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	OpenVPN-GUI	Affected: 2.5.2 and prior releases

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:01:07.343Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "OpenVPN-GUI",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.5.2 and prior releases"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-427",
              "description": "CWE-427 Uncontrolled Search Path Element",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-02T12:30:38.000Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@openvpn.net",
          "ID": "CVE-2021-3606",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "OpenVPN-GUI",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "2.5.2 and prior releases"
                          }
                        ]
                      }
                    }
                  ]
                },
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              }
            ]
          }
        },
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        "data_version": "4.0",
        "description": {
          "description_data": [
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              "value": "OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe)."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-427 Uncontrolled Search Path Element"
                }
              ]
            }
          ]
        },
        "references": {
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              "refsource": "MISC",
              "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
            },
            {
              "name": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606",
              "refsource": "MISC",
              "url": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2021-3606",
    "datePublished": "2021-07-02T12:30:38.000Z",
    "dateReserved": "2021-06-17T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:01:07.343Z",
    "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.