CVE-2023-47126 Explained : Impact and Mitigation

This article provides detailed information about CVE-2023-47126, an information disclosure vulnerability in typo3/cms-install that exposes sensitive information to an unauthorized actor.

Understanding CVE-2023-47126

CVE-2023-47126 relates to an exposure of sensitive information in the Install Tool of TYPO3, a popular open-source PHP-based web content management system. The vulnerability allows an attacker to view the full path of the transient data directory on the login screen, compromising user privacy and system security.

What is CVE-2023-47126?

In TYPO3 versions prior to 12.4.8, the standalone install tool inadvertently reveals the complete path of the transient data directory to unauthorized users during the login process. This information disclosure issue affects composer-based installations, while classic non-composer setups remain unaffected.

The Impact of CVE-2023-47126

The disclosure of sensitive directory paths poses a security risk as it may aid malicious actors in further attacks or unauthorized access to system resources. It can potentially lead to data breaches, compromise system integrity, and undermine user confidentiality.

Technical Details of CVE-2023-47126

The vulnerability is characterized by a CVSS v3.1 base score of 3.7, indicating a low severity level. It has a HIGH attack complexity and can be exploited over a NETWORK without requiring user interaction. The confidentiality impact is LOW, with no integrity or availability impacts. No special privileges are needed for exploitation.

Vulnerability Description

The flaw enables unauthorized users to obtain sensitive information, specifically revealing the full path of the transient data directory (/var/www/html/var/transient/) during the login process within composer-based TYPO3 installations.

Affected Systems and Versions

Users of TYPO3 versions equal to or greater than 12.2.0 and less than 12.4.8 are affected by this vulnerability. Organizations running composer-based TYPO3 setups should prioritize upgrading to version 12.4.8 to mitigate the risk.

Exploitation Mechanism

Exploiting the vulnerability requires network access, making it remotely exploitable. Attackers can leverage the exposed directory path to gather intelligence for potential follow-up attacks, emphasizing the importance of prompt mitigation.

Mitigation and Prevention

To address CVE-2023-47126, immediate actions and long-term security measures are recommended to safeguard TYPO3 installations from information disclosure risks.

Immediate Steps to Take

Upgrade affected TYPO3 installations to version 12.4.8 to prevent the exposure of sensitive directory paths on the login screen.

Long-Term Security Practices

Regularly monitor security advisories and apply updates promptly to mitigate emerging vulnerabilities in TYPO3 installations.

Patching and Updates

Stay informed about security patches released by TYPO3 to address known vulnerabilities and ensure the timely implementation of updates to enhance system security.