Vulnerability-Lookup

JVNDB-2021-000096

Vulnerability from jvndb - Published: 2021-10-29 06:11 - Updated:2021-10-29 06:11

Severity

7.4 (High) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Summary

Android App "Mercari (Merpay) - Marketplace and Mobile Payments App" (Japan version) vulnerable to improper handling of Intent

Details

Android App "Mercari (Merpay) - Marketplace and Mobile Payments App" (Japan version) provided by Mercari, Inc. is vulnerable to improper handling of Intent (CWE-939). RyotaK reported this vulnerability to Mercari, Inc. and Mercari, Inc. reported it to JPCERT/CC to disclose the vulnerability through JVN.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN49465877/index.html
	CVE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20835
	NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-20835
	Permissions(CWE-264)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

Mercari Co., Ltd.

Mercari

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-000096.html",
  "dc:date": "2021-10-29T15:11+09:00",
  "dcterms:issued": "2021-10-29T15:11+09:00",
  "dcterms:modified": "2021-10-29T15:11+09:00",
  "description": "Android App \"Mercari (Merpay) - Marketplace and Mobile Payments App\" (Japan version) provided by Mercari, Inc. is vulnerable to improper handling of Intent (CWE-939).\r\n\r\nRyotaK reported this vulnerability to Mercari, Inc. and Mercari, Inc. reported it to JPCERT/CC to disclose the vulnerability through JVN.",
  "link": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-000096.html",
  "sec:cpe": {
    "#text": "cpe:/a:mercari:mercari",
    "@product": "Mercari",
    "@vendor": "Mercari Co., Ltd.",
    "@version": "2.2"
  },
  "sec:cvss": [
    {
      "@score": "4.3",
      "@severity": "Medium",
      "@type": "Base",
      "@vector": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
      "@version": "2.0"
    },
    {
      "@score": "7.4",
      "@severity": "High",
      "@type": "Base",
      "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
      "@version": "3.0"
    }
  ],
  "sec:identifier": "JVNDB-2021-000096",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN49465877/index.html",
      "@id": "JVN#49465877",
      "@source": "JVN"
    },
    {
      "#text": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20835",
      "@id": "CVE-2021-20835",
      "@source": "CVE"
    },
    {
      "#text": "https://nvd.nist.gov/vuln/detail/CVE-2021-20835",
      "@id": "CVE-2021-20835",
      "@source": "NVD"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-264",
      "@title": "Permissions(CWE-264)"
    }
  ],
  "title": "Android App \"Mercari (Merpay) - Marketplace and Mobile Payments App\" (Japan version) vulnerable to improper handling of Intent"
}

CVE-2021-20835 (GCVE-0-2021-20835)

Vulnerability from cvelistv5 – Published: 2021-11-24 08:25 – Updated: 2024-08-03 17:53

Summary

Improper authorization in handler for custom URL scheme vulnerability in Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) versions prior to 4.49.1 allows a remote attacker to lead a user to access an arbitrary website and the website launches an arbitrary Activity of the app via the vulnerable App, which may result in Mercari account's access token being obtained.

Severity

No CVSS data available.

CWE

Improper Authorization in Handler for Custom URL Scheme

Assigner

jpcert jpcert root

References

1 reference

URL	Tags
https://jvn.jp/en/jp/JVN49465877/index.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Mercari, Inc.	Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version)	Affected: versions prior to 4.49.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:53:23.012Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://jvn.jp/en/jp/JVN49465877/index.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Android App \u0027Mercari (Merpay) - Marketplace and Mobile Payments App\u0027 (Japan version)",
          "vendor": "Mercari, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "versions prior to 4.49.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper authorization in handler for custom URL scheme vulnerability in Android App \u0027Mercari (Merpay) - Marketplace and Mobile Payments App\u0027 (Japan version) versions prior to 4.49.1 allows a remote attacker to lead a user to access an arbitrary website and the website launches an arbitrary Activity of the app via the vulnerable App, which may result in Mercari account\u0027s access token being obtained."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper Authorization in Handler for Custom URL Scheme",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-24T08:25:38.000Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://jvn.jp/en/jp/JVN49465877/index.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "vultures@jpcert.or.jp",
          "ID": "CVE-2021-20835",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Android App \u0027Mercari (Merpay) - Marketplace and Mobile Payments App\u0027 (Japan version)",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "versions prior to 4.49.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Mercari, Inc."
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Improper authorization in handler for custom URL scheme vulnerability in Android App \u0027Mercari (Merpay) - Marketplace and Mobile Payments App\u0027 (Japan version) versions prior to 4.49.1 allows a remote attacker to lead a user to access an arbitrary website and the website launches an arbitrary Activity of the app via the vulnerable App, which may result in Mercari account\u0027s access token being obtained."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Improper Authorization in Handler for Custom URL Scheme"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://jvn.jp/en/jp/JVN49465877/index.html",
              "refsource": "MISC",
              "url": "https://jvn.jp/en/jp/JVN49465877/index.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2021-20835",
    "datePublished": "2021-11-24T08:25:38.000Z",
    "dateReserved": "2020-12-17T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:53:23.012Z",
    "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.

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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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JVNDB-2021-000096

CVE-2021-20835 (GCVE-0-2021-20835)

Tags

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Nomenclature

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