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GHSA-2HF9-98XV-3H7H

Vulnerability from github – Published: 2021-11-25 00:00 – Updated: 2022-05-04 00:00

Details

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

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-20835"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862",
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-11-24T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-2hf9-98xv-3h7h",
  "modified": "2022-05-04T00:00:57Z",
  "published": "2021-11-25T00:00:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20835"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/jp/JVN49465877/index.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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

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

Summary

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

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JSON

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          "dateUpdated": "2024-08-03T17:53:23.012Z",
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            ],
            "url": "https://jvn.jp/en/jp/JVN49465877/index.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "vendor": "Mercari, Inc.",
          "versions": [
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        }
      ],
      "problemTypes": [
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        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
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      },
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  },
  "dataType": "CVE_RECORD",
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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.

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GHSA-2HF9-98XV-3H7H

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

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