CVE-2020-7692 : Vulnerability Insights and Analysis

This CVE-2020-7692 article provides insights into an Improper Authorization vulnerability affecting com.google.oauth-client:google-oauth-client.

Understanding CVE-2020-7692

CVE-2020-7692 is an issue where PKCE support is not correctly implemented in OAuth 2.0 for Native Apps, leading to an authorization code vulnerability.

What is CVE-2020-7692?

PKCE support is not implemented as per OAuth 2.0 RFC for Native Apps.
Attackers can exploit this by obtaining the authorization code through a malicious app.

The Impact of CVE-2020-7692

CVSS Score: 7.4 (High)
Severity: High
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: High
Privileges Required: None

Technical Details of CVE-2020-7692

This section delves into the vulnerability's description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

PKCE support not following OAuth 2.0 RFC for Native Apps.
Authorization code misuse due to lack of PKCE implementation.

Affected Systems and Versions

Package: com.google.oauth-client:google-oauth-client
Versions Affected: < 1.31.0

Exploitation Mechanism

Attacker uses a malicious app to obtain the authorization code.

Mitigation and Prevention

Learn about the immediate steps and long-term practices to secure systems against CVE-2020-7692.

Immediate Steps to Take

Update to version 1.31.0 or above.
Implement PKCE support as per OAuth 2.0 RFC.

Long-Term Security Practices

Regularly review and update OAuth implementations.
Conduct security audits to identify and address authorization vulnerabilities.

Patching and Updates

Apply patches provided by the vendor to fix the PKCE support issue.