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CVE-2020-36285 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://mobitec.ie.cuhk.edu.hk/cve_2020/	CVE	Permissions Required
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0	CVE	Third Party Advisory
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0	CVE	Third Party Advisory
http://mobitec.ie.cuhk.edu.hk/cve_2020/	[email protected]	Permissions Required
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0	[email protected]	Third Party Advisory
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0	[email protected]	Third Party Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-347	Improper Verification of Cryptographic Signature	[email protected]

Affected Products

Product	Versions
unionpayintl union pay	<= 3.3.12
CPE cpe:2.3:a:unionpayintl:union_pay::::::iphone_os::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Apr 9, 2021	Initial Analysis	[email protected]