Vulnerability · Published Apr 6, 2021 · Assigned by mitre

CVE-2020-36284

High 7.5

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)0.9%top 40.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Union Pay up to 3.4.93.4.9, for android, 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 products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 x_refsource_MISC
https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0 x_refsource_MISC
http://mobitec.ie.cuhk.edu.hk/cve_2020/ x_refsource_MISC