CVE-2020-23533

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Third-Party Advisory dropbox.com Third-Party Advisory dropbox.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
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

Frequently Asked Questions

What is the severity of CVE-2020-23533?
CVE-2020-23533 has been scored as a high severity vulnerability.
How to fix CVE-2020-23533?
To fix CVE-2020-23533, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-23533 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-23533 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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