CVE-2021-41114 : Exploit Details and Defense Strategies

TYPO3 is an open-source PHP-based web content management system that has been found vulnerable to HTTP Host header injection. This CVE-2021-41114 affects TYPO3 versions from 11.0.0 to 11.5.0, leading to host spoofing due to inadequate validation of the HTTP Host header.

Understanding CVE-2021-41114

What is CVE-2021-41114?

TYPO3, a popular CMS, is impacted by improper validation of the HTTP Host header, allowing attackers to manipulate the header and potentially perform host spoofing attacks.

The Impact of CVE-2021-41114

The vulnerability introduces a risk of host spoofing in TYPO3 CMS, potentially leading to security breaches and unauthorized access.

Technical Details of CVE-2021-41114

Vulnerability Description

The vulnerability stems from improper validation of the HTTP Host header in TYPO3.

Affected Systems and Versions

TYPO3 versions >= 11.0.0, < 11.5.0 are vulnerable to this issue.

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Integrity Impact: Low
Privileges Required: None

Mitigation and Prevention

Immediate Steps to Take

Implement the provided patch from TYPO3 to mitigate the vulnerability.
Regularly monitor security advisories for updates.

Long-Term Security Practices

Conduct regular security assessments and audits of your TYPO3 installation.
Train personnel on security best practices to prevent similar vulnerabilities.

Patching and Updates

Apply security patches and updates promptly to ensure the latest security measures are in place.