CVE-2020-36284 : Exploit Details and Defense Strategies

Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allowing attackers to shop for free in merchants' websites and mobile apps via a crafted authentication code (MAC) generated based on a NULL secret key.

Understanding CVE-2020-36284

This CVE involves a critical vulnerability in Union Pay for Android that can be exploited by attackers to make unauthorized purchases.

What is CVE-2020-36284?

The CVE-2020-36284 vulnerability in Union Pay for Android allows attackers to shop for free on merchants' websites and mobile apps by using a specially crafted authentication code.

The Impact of CVE-2020-36284

The vulnerability enables attackers to exploit a flaw in cryptographic signature verification, potentially leading to financial losses for merchants and users.

Technical Details of CVE-2020-36284

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Union Pay for Android arises from improper verification of cryptographic signatures, allowing attackers to generate a crafted authentication code for free shopping.

Affected Systems and Versions

Affected System: Union Pay for Android
Affected Versions: Up to 3.4.93.4.9

Exploitation Mechanism

Attackers exploit the vulnerability by creating a crafted authentication code (MAC) based on a NULL secret key, enabling unauthorized shopping.

Mitigation and Prevention

Protecting systems from CVE-2020-36284 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable Union Pay for Android until a patch is available.
Monitor accounts for any unauthorized transactions.
Implement multi-factor authentication for added security.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities.
Conduct security audits and penetration testing to identify and address weaknesses.

Patching and Updates

Apply security patches provided by Union Pay promptly.
Stay informed about security advisories and updates from the vendor for further protection.