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7.5
HIGH CVSS 3.1
CVE-2020-23533
Union Pay Authentication Code Validation Weakness
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.

INFO

Published Date :

April 6, 2021, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 5:13 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2020-23533 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Unionpayintl union_pay
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-23533.

URL Resource
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-23533 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-23533 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-23533 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2020-23533 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://mobitec.ie.cuhk.edu.hk/cve_2020/
    Added Reference https://cwe.mitre.org/data/definitions/347.html
    Added Reference https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
    Added Reference https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Nov. 05, 2022

    Action Type Old Value New Value
    Changed Reference Type https://cwe.mitre.org/data/definitions/347.html No Types Assigned https://cwe.mitre.org/data/definitions/347.html Technical Description
  • CVE Modified by [email protected]

    Jul. 10, 2022

    Action Type Old Value New Value
    Added Reference https://cwe.mitre.org/data/definitions/347.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Apr. 09, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type http://mobitec.ie.cuhk.edu.hk/cve_2020/ No Types Assigned http://mobitec.ie.cuhk.edu.hk/cve_2020/ Permissions Required
    Changed Reference Type https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 No Types Assigned https://www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py?dl=0 Third Party Advisory
    Changed Reference Type https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0 No Types Assigned https://www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0 Third Party Advisory
    Added CWE NIST CWE-347
    Added CPE Configuration OR *cpe:2.3:a:unionpayintl:union_pay:*:*:*:*:*:*:*:* versions up to (including) 1.2.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.15 }} 0.02%

score

0.32760

percentile