cnvd - cnvd-2021-49080

cnvd-2021-49080

Vulnerability from cnvd

Title: Kaseya VSA输入验证错误漏洞

Description:

Kaseya VSA RMM是瑞士卡西亚（Kaseya）公司的一套远程监控和终端管理解决方案。

Kaseya VSA存在输入验证错误漏洞，该漏洞源于网络系统或产品未对输入的数据进行正确的验证。远程攻击者可利用该漏洞危及受影响的系统。

Severity: 高

Formal description:

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.cybersecurity-help.cz/vdb/SB2021070501

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-30116

Impacted products

Name
Kaseya Kaseya VSA

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-30116",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-30116"
    }
  },
  "description": "Kaseya VSA RMM\u662f\u745e\u58eb\u5361\u897f\u4e9a\uff08Kaseya\uff09\u516c\u53f8\u7684\u4e00\u5957\u8fdc\u7a0b\u76d1\u63a7\u548c\u7ec8\u7aef\u7ba1\u7406\u89e3\u51b3\u65b9\u6848\u3002\n\nKaseya VSA\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u672a\u5bf9\u8f93\u5165\u7684\u6570\u636e\u8fdb\u884c\u6b63\u786e\u7684\u9a8c\u8bc1\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5371\u53ca\u53d7\u5f71\u54cd\u7684\u7cfb\u7edf\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.cybersecurity-help.cz/vdb/SB2021070501",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-49080",
  "openTime": "2021-07-10",
  "products": {
    "product": "Kaseya Kaseya VSA"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-30116",
  "serverity": "\u9ad8",
  "submitTime": "2021-07-06",
  "title": "Kaseya VSA\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-30116 (GCVE-0-2021-30116)

Vulnerability from cvelistv5

Published

2021-07-09 00:00

Modified

2025-07-30 01:38

Severity ?

10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE

Summary

Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:\Program Files (x86)\Kaseya\XXXXXXXXXX\KaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813&pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system.

References

▼	URL	Tags
	https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/
	https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021
	https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/
	https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T22:24:59.326Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
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            "tags": [
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            "url": "https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/"
          },
          {
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            ],
            "url": "https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021"
          },
          {
            "tags": [
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            ],
            "url": "https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-30116",
                "options": [
                  {
                    "Exploitation": "active"
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                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-04T19:41:32.875937Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2021-11-03",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30116"
              },
              "type": "kev"
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "timeline": [
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            "time": "2021-11-03T00:00:00+00:00",
            "value": "CVE-2021-30116 added to CISA KEV"
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        ],
        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
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          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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      "credits": [
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          "lang": "en",
          "value": "Discovered by Wietse Boonstra of DIVD"
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          "lang": "en",
          "value": "Additional research by Frank Breedijk of DIVD"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:\\Program Files (x86)\\Kaseya\\XXXXXXXXXX\\KaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813\u0026pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system."
        }
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      "metrics": [
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          "cvssV3_1": {
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            "attackVector": "NETWORK",
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            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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          }
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        "dateUpdated": "2023-10-23T13:12:39.540Z",
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          "url": "https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/"
        },
        {
          "url": "https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021"
        },
        {
          "url": "https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/"
        },
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          "url": "https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to a version after 9.5.6"
        }
      ],
      "source": {
        "advisory": "DIVD-2021-00011",
        "discovery": "INTERNAL"
      },
      "title": "Unauthenticated credential leak and business logic flaw in Kaseya VSA \u003c= v9.5.6",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
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  "cveMetadata": {
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    "assignerShortName": "mitre",
    "cveId": "CVE-2021-30116",
    "datePublished": "2021-07-09T00:00:00.000Z",
    "dateReserved": "2021-04-02T00:00:00.000Z",
    "dateUpdated": "2025-07-30T01:38:07.222Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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