Vulnerability-Lookup

CNVD-2020-50545

Vulnerability from cnvd - Published: 2020-09-03

Title

Fortinet FortiOS SSL VPN授权问题漏洞

Description

Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。SSL VPN是其中的一个使用安全套接字层协议（SSL）的虚拟私人网络（VPN）组件。 Fortinet FortiOS 6.4.0版本、6.2.0版本至6.2.3版本和6.0.9及之前版本中的SSL VPN存在安全漏洞，该漏洞源于程序未正确进行身份验证。攻击者可通过更改用户名的大小写利用该漏洞绕过第二级的身份验证（FortiToken）。

Severity

高

Patch Name

Fortinet FortiOS SSL VPN授权问题漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://fortiguard.com/psirt/FG-IR-19-283

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-12812

Impacted products

Name
['Fortinet Fortinet FortiOS <6.0.9', 'Fortinet FortiOS 6.4.0', 'Fortinet FortiOS >=6.2.0，<=6.2.3']

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-12812",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-12812"
    }
  },
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  "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://fortiguard.com/psirt/FG-IR-19-283",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-50545",
  "openTime": "2020-09-03",
  "patchDescription": "Fortinet FortiOS\u662f\u7f8e\u56fd\u98de\u5854\uff08Fortinet\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e13\u7528\u4e8eFortiGate\u7f51\u7edc\u5b89\u5168\u5e73\u53f0\u4e0a\u7684\u5b89\u5168\u64cd\u4f5c\u7cfb\u7edf\u3002\u8be5\u7cfb\u7edf\u4e3a\u7528\u6237\u63d0\u4f9b\u9632\u706b\u5899\u3001\u9632\u75c5\u6bd2\u3001IPSec/SSLVPN\u3001Web\u5185\u5bb9\u8fc7\u6ee4\u548c\u53cd\u5783\u573e\u90ae\u4ef6\u7b49\u591a\u79cd\u5b89\u5168\u529f\u80fd\u3002SSL VPN\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u4f7f\u7528\u5b89\u5168\u5957\u63a5\u5b57\u5c42\u534f\u8bae\uff08SSL\uff09\u7684\u865a\u62df\u79c1\u4eba\u7f51\u7edc\uff08VPN\uff09\u7ec4\u4ef6\u3002\r\n\r\nFortinet FortiOS 6.4.0\u7248\u672c\u30016.2.0\u7248\u672c\u81f36.2.3\u7248\u672c\u548c6.0.9\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u7684SSL VPN\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u6b63\u786e\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u66f4\u6539\u7528\u6237\u540d\u7684\u5927\u5c0f\u5199\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u7b2c\u4e8c\u7ea7\u7684\u8eab\u4efd\u9a8c\u8bc1\uff08FortiToken\uff09\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": "Fortinet FortiOS SSL VPN\u6388\u6743\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Fortinet Fortinet FortiOS \u003c6.0.9",
      "Fortinet FortiOS 6.4.0",
      "Fortinet FortiOS \u003e=6.2.0\uff0c\u003c=6.2.3"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-12812",
  "serverity": "\u9ad8",
  "submitTime": "2020-08-05",
  "title": "Fortinet FortiOS SSL VPN\u6388\u6743\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-12812 (GCVE-0-2020-12812)

Vulnerability from cvelistv5 – Published: 2020-07-24 22:28 – Updated: 2026-08-12 03:55

Summary

An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2021-04-22 00:00 UTC

CWE

Improper Access Control
CWE-287 - Improper Authentication

Assigner

fortinet mitre root Scorecard

References

2 references

URL	Tags
https://fortiguard.com/psirt/FG-IR-19-283	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
n/a	Fortinet FortiOS	Affected: FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below

Show details on NVD website

JSON

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{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:04:22.855Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://fortiguard.com/psirt/FG-IR-19-283"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-12812",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2021-04-22T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2021-11-03",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-12812"
              },
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            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
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            ]
          }
        ],
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            ],
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          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2021-11-03T00:00:00.000Z",
            "value": "CVE-2020-12812 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Fortinet FortiOS",
          "vendor": "n/a",
          "versions": [
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        }
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      ],
      "x_legacyV4Record": {
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        },
        "affects": {
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    "state": "PUBLISHED"
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}

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.
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CNVD-2020-50545

CVE-2020-12812 (GCVE-0-2020-12812)

Tags

Sightings

Nomenclature

Related by attack behaviour