CVE-2020-23533

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{"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:*:*:*:*:*:*:*:*", "matchCriteriaId": "BA107514-9F6F-43E9-BA77-D96AB3D6AFAC", "versionEndIncluding": "1.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Union Pay up to 1.2.0, for web based versions 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."}, {"lang": "es", "value": "Union Pay versiones hasta 1.2.0, para versiones basadas en web, 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. basado en una clave secreta que es NULL"}], "id": "CVE-2020-23533", "lastModified": "2026-06-17T03:04:46.747", "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": "2021-04-06T16:15:14.863", "references": [{"source": "cve@mitre.org", "tags": ["Permissions Required"], "url": "http://mobitec.ie.cuhk.edu.hk/cve_2020/"}, {"source": "cve@mitre.org", "tags": ["Technical Description"], "url": "https://cwe.mitre.org/data/definitions/347.html"}, {"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": ["Technical Description"], "url": "https://cwe.mitre.org/data/definitions/347.html"}, {"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"}]}

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