CVEvulnerability
CVE-2020-23533
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-04-06
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-347
Description
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.
Affected configurations
• unionpayintl union pay (<= 1.2.0)
Related
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- http://mobitec.ie.cuhk.edu.hk/cve_2020/ Permissions Required
- https://cwe.mitre.org/data/definitions/347.html Technical Description
- https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 Third Party Advisory
- https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0 Third Party Advisory
- http://mobitec.ie.cuhk.edu.hk/cve_2020/ Permissions Required
- https://cwe.mitre.org/data/definitions/347.html Technical Description
- https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 Third Party Advisory
- https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0 Third Party Advisory