CVE Vulnerability

CVE-2020-36285

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
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://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:unionpayintl:union_pay:*:*:*:*:*:iphone_os:*:*
Information

Published : 2021-04-06 04:15

Updated : 2021-04-09 05:13

NVD link : CVE-2020-36285

Mitre link : CVE-2020-36285

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature