Vulnerability-Lookup

CNVD-2021-21944

Vulnerability from cnvd - Published: 2021-03-24

Title

DrayTek Vigor2960、Vigor3900和Vigor300B冲区溢出漏洞

Description

DrayTek Vigor3900等都是中国台湾居易科技（DrayTek）公司的产品。DrayTek Vigor3900是一款宽带路由器/VPN网关设备。Vigor2960是一款负载平衡路由器和VPN网关设备。Vigor300B是一款负载均衡路由器。 DrayTek Vigor2960、Vigor3900和Vigor300B 1.5.1.1之前版本中存在缓冲区溢出漏洞。远程攻击者可通过向mainuser.cgi文件发送带有‘formuserphonenumber’参数的authusersms请求利用该漏洞执行任意代码。

Severity

高

Patch Name

DrayTek Vigor2960、Vigor3900和Vigor300B冲区溢出漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： https://www.draytek.com/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-14993

Impacted products

Name
['DrayTek Vigor3900 <1.5.1.1', 'DrayTek Vigor2960 <1.5.1.1', 'DrayTek Vigor300B <1.5.1.1']

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-14993"
    }
  },
  "description": "DrayTek Vigor3900\u7b49\u90fd\u662f\u4e2d\u56fd\u53f0\u6e7e\u5c45\u6613\u79d1\u6280\uff08DrayTek\uff09\u516c\u53f8\u7684\u4ea7\u54c1\u3002DrayTek Vigor3900\u662f\u4e00\u6b3e\u5bbd\u5e26\u8def\u7531\u5668/VPN\u7f51\u5173\u8bbe\u5907\u3002Vigor2960\u662f\u4e00\u6b3e\u8d1f\u8f7d\u5e73\u8861\u8def\u7531\u5668\u548cVPN\u7f51\u5173\u8bbe\u5907\u3002Vigor300B\u662f\u4e00\u6b3e\u8d1f\u8f7d\u5747\u8861\u8def\u7531\u5668\u3002\n\nDrayTek Vigor2960\u3001Vigor3900\u548cVigor300B 1.5.1.1\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5411mainuser.cgi\u6587\u4ef6\u53d1\u9001\u5e26\u6709\u2018formuserphonenumber\u2019\u53c2\u6570\u7684authusersms\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://www.draytek.com/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-21944",
  "openTime": "2021-03-24",
  "patchDescription": "DrayTek Vigor3900\u7b49\u90fd\u662f\u4e2d\u56fd\u53f0\u6e7e\u5c45\u6613\u79d1\u6280\uff08DrayTek\uff09\u516c\u53f8\u7684\u4ea7\u54c1\u3002DrayTek Vigor3900\u662f\u4e00\u6b3e\u5bbd\u5e26\u8def\u7531\u5668/VPN\u7f51\u5173\u8bbe\u5907\u3002Vigor2960\u662f\u4e00\u6b3e\u8d1f\u8f7d\u5e73\u8861\u8def\u7531\u5668\u548cVPN\u7f51\u5173\u8bbe\u5907\u3002Vigor300B\u662f\u4e00\u6b3e\u8d1f\u8f7d\u5747\u8861\u8def\u7531\u5668\u3002\r\n\r\nDrayTek Vigor2960\u3001Vigor3900\u548cVigor300B 1.5.1.1\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5411mainuser.cgi\u6587\u4ef6\u53d1\u9001\u5e26\u6709\u2018formuserphonenumber\u2019\u53c2\u6570\u7684authusersms\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\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": "DrayTek Vigor2960\u3001Vigor3900\u548cVigor300B\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "DrayTek Vigor3900 \u003c1.5.1.1",
      "DrayTek Vigor2960 \u003c1.5.1.1",
      "DrayTek Vigor300B \u003c1.5.1.1"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-14993",
  "serverity": "\u9ad8",
  "submitTime": "2020-06-24",
  "title": "DrayTek Vigor2960\u3001Vigor3900\u548cVigor300B\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2020-14993 (GCVE-0-2020-14993)

Vulnerability from cvelistv5 – Published: 2020-06-23 11:50 – Updated: 2024-08-04 13:00

Summary

A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://github.com/dexterone/Vigor-poc	x_refsource_MISC
https://www.draytek.com/about/security-advisory	x_refsource_MISC
https://www.draytek.com/about/security-advisory/v…	x_refsource_CONFIRM

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:00:52.170Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/dexterone/Vigor-poc"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.draytek.com/about/security-advisory"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
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              "version": "n/a"
            }
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      ],
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          "value": "A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-06-24T16:47:19.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/dexterone/Vigor-poc"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.draytek.com/about/security-advisory"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-14993",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
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            }
          ]
        },
        "problemtype": {
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        },
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            {
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            },
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            },
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              "name": "https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473)",
              "refsource": "CONFIRM",
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  "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.

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Action not permitted

CNVD-2021-21944

CVE-2020-14993 (GCVE-0-2020-14993)

Tags

Sightings

Nomenclature

Related by attack behaviour