cve/2020/CVE-2020-36285.md

### [CVE-2020-36285](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36285)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
- https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
- https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0

#### Github
No PoCs found on GitHub currently.