CVE-2020-23533

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 37%
VendorProductVersion
unionpayintlunion_pay
𝑥
≤ 1.2.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://mobitec.ie.cuhk.edu.hk/cve_2020/
https://cwe.mitre.org/data/definitions/347.html
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0
http://mobitec.ie.cuhk.edu.hk/cve_2020/
https://cwe.mitre.org/data/definitions/347.html
https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0