CVE-2020-36285

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

Union Pay up to 3.3.12, for iOS mobile apps, 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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://mobitec.ie.cuhk.edu.hk/cve_2020/Permissions Required
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0Third Party Advisory
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0Third Party Advisory
http://mobitec.ie.cuhk.edu.hk/cve_2020/Permissions Required
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0Third Party Advisory
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0Third Party Advisory

Timeline

Published: Apr 6, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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