CVE-2020-36285

HIGH

Union Pay <= 3.3.12 - Improper Verification of Cryptographic Signature via Crafted Authentication Code

Title source: llm
STIX 2.1

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.

References (3)

Core 3
Core References
Third Party Advisory x_refsource_misc
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
Permissions Required x_refsource_misc
http://mobitec.ie.cuhk.edu.hk/cve_2020/

Scores

CVSS v3 7.5
EPSS 0.0090
EPSS Percentile 55.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-347
Status published
Products (1)
unionpayintl/union_pay < 3.3.12
Published Apr 06, 2021
Tracked Since Feb 18, 2026