CVE-2020-26229 : Exploit Details and Defense Strategies

TYPO3 is an open-source PHP-based web content management system. In TYPO3 versions from 10.4.0 to 10.4.10, there is a vulnerability in RSS widgets that makes them susceptible to XML external entity processing. This CVE has a low base score of 3.7.

Understanding CVE-2020-26229

This CVE involves an XML External Entity vulnerability in the Dashboard Widget of TYPO3.

What is CVE-2020-26229?

This vulnerability allows attackers to exploit XML external entities in RSS widgets within TYPO3 versions 10.4.0 to 10.4.10, potentially leading to unauthorized information disclosure.

The Impact of CVE-2020-26229

CVSS Score: 3.7 (Low)
Attack Vector: Network
Attack Complexity: High
User Interaction: Required
Privileges Required: Low
Confidentiality Impact: Low
Integrity Impact: None
Availability Impact: Low

Technical Details of CVE-2020-26229

This section provides more in-depth technical details about the vulnerability.

Vulnerability Description

The vulnerability arises from improper restriction of XML external entity references in RSS widgets of TYPO3.

Affected Systems and Versions

Affected Product: TYPO3.CMS
Vendor: TYPO3
Vulnerable Versions: >= 10.0.0, < 10.4.10

Exploitation Mechanism

To exploit this vulnerability, an attacker needs a valid backend user account and the ability to interact with the network.

Mitigation and Prevention

Protect your systems from CVE-2020-26229 by following these steps:

Immediate Steps to Take

Update TYPO3 to version 10.4.10 to address the vulnerability.

Long-Term Security Practices

Regularly monitor security advisories for TYPO3.
Implement strong access controls and user permissions.

Patching and Updates

Stay informed about security patches and updates released by TYPO3.