CVE-2023-46733 : Security Advisory and Response

This article provides detailed information on CVE-2023-46733, a vulnerability in Symfony related to possible session fixation.

Understanding CVE-2023-46733

This section explores the nature and impact of the vulnerability in Symfony.

What is CVE-2023-46733?

The CVE-2023-46733 vulnerability is related to Symfony, a PHP framework for web and console applications. In affected versions 5.4.21 and 6.2.7, the

SessionStrategyListener

does not migrate the session after every successful login, potentially leading to session fixation.

The Impact of CVE-2023-46733

The vulnerability can result in session fixation, where an attacker could hijack a user's session and impersonate them on the affected Symfony application.

Technical Details of CVE-2023-46733

This section delves into the technical aspects of the CVE-2023-46733 vulnerability.

Vulnerability Description

In affected Symfony versions, the session id is not regenerated when the token type changes, leaving the session vulnerable to fixation. Symfony now addresses this issue in versions 5.4.31 and 6.3.8 by checking both the user identifier and token type before deciding to regenerate the session id.

Affected Systems and Versions

Symfony versions >= 5.4.21 and < 5.4.31, as well as >= 6.2.7 and < 6.3.8, are impacted by this vulnerability.

Exploitation Mechanism

Attackers could exploit this vulnerability to potentially hijack user sessions through session fixation attacks.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the CVE-2023-46733 vulnerability.

Immediate Steps to Take

Users and administrators are advised to update Symfony to versions 5.4.31 and 6.3.8 or later to address the session fixation vulnerability.

Long-Term Security Practices

Implementing secure session management practices and regularly updating Symfony to the latest versions can help prevent such vulnerabilities.

Patching and Updates

Ensure timely application of security patches and stay informed about security advisories to protect against potential threats.