SB2019041705 - Multiple vulnerabilities in Drupal

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2019-10909)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the form theme of the PHP templating engine. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

2) Code injection (CVE-ID: CVE-2019-10910)

The disclosed vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient sanitization of user-supplied data related to service identifiers. A remote attacker can send specially crafted HTTP request to the affected system and execute arbitrary PHP code.

Successful exploitation of this vulnerability may allow a remote attacker to compromise the affected application.

3) Improper authentication (CVE-ID: CVE-2019-10911)

The disclosed vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the way application handles values within HTTP cookies, related to session expiration time and username. A remote attacker can modify the remember me cookie value and authenticate as a different user.

This attack is only possible if remember me functionality is enabled and the two users share a password hash or the password hashes (e.g. UserInterface::getPassword()) are null for all users (which is valid if passwords are checked by an external system, e.g. an SSO).

Remediation

Install update from vendor's website.

References

• https://www.drupal.org/sa-core-2019-005