Vulnerability-Lookup

FKIE_CVE-2020-36284

Vulnerability from fkie_nvd - Published: 2021-04-06 16:15 - Updated: 2026-06-17 03:15

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants' websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL.

References

URL	Tags
cve@mitre.org	http://mobitec.ie.cuhk.edu.hk/cve_2020/	Permissions Required
cve@mitre.org	https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0	Third Party Advisory
cve@mitre.org	https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://mobitec.ie.cuhk.edu.hk/cve_2020/	Permissions Required
af854a3a-2127-422b-91ae-364da2661108	https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0	Third Party Advisory

Impacted products

	Vendor	Product	Version
	unionpayintl	union_pay	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:unionpayintl:union_pay:*:*:*:*:*:android:*:*",
              "matchCriteriaId": "7F4798B6-5310-43D7-8A89-FD531B25E836",
              "versionEndIncluding": "3.4.93.4.9",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants\u0027 websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL."
    },
    {
      "lang": "es",
      "value": "Union Pay versiones  hasta 3.4.93.4.9, para Android, contiene un CWE-347: Verificaci\u00f3n Inapropiada de la vulnerabilidad de Firma Criptogr\u00e1fica, permite a atacantes comprar gratis en los sitios web y aplicaciones m\u00f3viles de comerciantes, por medio de un c\u00f3digo de autenticaci\u00f3n (MAC) dise\u00f1ado el cual es generado en base a una clave secreta que es NULL"
    }
  ],
  "id": "CVE-2020-36284",
  "lastModified": "2026-06-17T03:15:15.097",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-06T16:15:15.317",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Permissions Required"
      ],
      "url": "http://mobitec.ie.cuhk.edu.hk/cve_2020/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required"
      ],
      "url": "http://mobitec.ie.cuhk.edu.hk/cve_2020/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-36284 (GCVE-0-2020-36284)

Vulnerability from cvelistv5 – Published: 2021-04-06 15:36 – Updated: 2024-08-04 17:23

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2349 records in the last 180 days details

References

3 references

URL	Tags
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_cod…	x_refsource_MISC
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPa…	x_refsource_MISC
http://mobitec.ie.cuhk.edu.hk/cve_2020/	x_refsource_MISC

Date Public

2021-04-03 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T17:23:10.234Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://mobitec.ie.cuhk.edu.hk/cve_2020/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
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              "version": "n/a"
            }
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      "descriptions": [
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          "value": "Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants\u0027 websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL."
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "lang": "en",
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            }
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      "providerMetadata": {
        "dateUpdated": "2021-04-06T15:36:50.000Z",
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      },
      "references": [
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            "x_refsource_MISC"
          ],
          "url": "https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://mobitec.ie.cuhk.edu.hk/cve_2020/"
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      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-36284",
          "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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  "cveMetadata": {
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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.

Vulnerability timeline

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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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