CVE-2020-1727 : Vulnerability Insights and Analysis

A vulnerability in Keycloak before version 9.0.2 allows for crafting malicious deep links, posing a security risk to affected clients.

Understanding CVE-2020-1727

Keycloak before 9.0.2 is susceptible to a flaw that lacks proper input validation in Authorization URLs, permitting various characters, leading to potential attack scenarios.

What is CVE-2020-1727?

This CVE identifies a security issue in Keycloak versions earlier than 9.0.2, enabling the creation of harmful deep links that could compromise affected systems.

The Impact of CVE-2020-1727

Base Score: 6.4 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Confidentiality and Integrity Impact: Low
Scope: Changed
Privileges Required: Low
The vulnerability could be exploited by a malicious actor to launch attacks on clients utilizing affected Authorization URLs.

Technical Details of CVE-2020-1727

Keycloak Vulnerability Details

Vulnerability Description

The flaw allows inappropriate characters in Authorization URLs, facilitating the crafting of deep links, potentially introducing further attack vectors on impacted clients.

Affected Systems and Versions

Affected Product: Keycloak
Vendor: [UNKNOWN]
Versions Affected: Versions before 9.0.2

Exploitation Mechanism

The lack of proper input validation in IDP server Authorization URLs allows threat actors to exploit the vulnerability by crafting malicious deep links.

Mitigation and Prevention

Protective Measures for CVE-2020-1727

Immediate Steps to Take

Update Keycloak to version 9.0.2 or newer to mitigate the vulnerability.
Monitor and restrict access to vulnerable Authorization URLs.

Long-Term Security Practices

Implement strict input validation for all authorization mechanisms.
Educate users on identifying and avoiding malicious deep links.

Patching and Updates

Regularly check for security updates and apply patches promptly to eliminate vulnerabilities.