CVE-2021-22101 Explained : Impact and Mitigation

A detailed analysis of CVE-2021-22101 highlighting the vulnerability in Cloud Foundry Cloud Controller versions prior to 1.118.0 and its impact.

Understanding CVE-2021-22101

This section provides insights into the nature and consequences of the vulnerability.

What is CVE-2021-22101?

CVE-2021-22101 affects Cloud Foundry Cloud Controller versions prior to 1.118.0. It is a vulnerability that allows unauthenticated attackers to execute a denial of service attack by sending specific REST HTTP requests to multiple V3 endpoints.

The Impact of CVE-2021-22101

The vulnerability can be exploited to cause unauthenticated denial of service by generating large SQL queries through REST HTTP requests, affecting the availability of the service and potentially disrupting operations.

Technical Details of CVE-2021-22101

This section delves into the specifics of the vulnerability.

Vulnerability Description

Cloud Foundry Cloud Controller versions prior to 1.118.0 are susceptible to unauthenticated denial of service attacks due to a flaw in processing REST HTTP requests with label_selectors.

Affected Systems and Versions

The vulnerability impacts Cloud Foundry Cloud Controller versions prior to 1.118.0, making them susceptible to denial of service attacks.

Exploitation Mechanism

Attackers exploit this vulnerability by utilizing REST HTTP requests with label_selectors on multiple V3 endpoints, generating overly large SQL queries to overwhelm the system.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-22101.

Immediate Steps to Take

Organizations should update their Cloud Foundry Cloud Controller to version 1.118.0 or newer to address the vulnerability and prevent potential denial of service attacks.

Long-Term Security Practices

Implement secure coding practices and conduct regular security assessments to identify and remediate vulnerabilities proactively.

Patching and Updates

Stay informed about security updates from Cloud Foundry and promptly apply patches to ensure the infrastructure is protected against known vulnerabilities.