#web

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors might be helpful in your situation: The Windows message queuing service, which is a Windows component, needs to be enabled for a system to be exploitable by this vulnerability. This feature can be added via the Control Panel. You can check to see if there is a service running named **Message Queuing** and TCP port 1801 is listening on the machine.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.

This vulnerability is only exploitable on Windows Servers that have installed and configured the Routing and Remote Access Service (RRAS) role which is not installed and configured by default. Please see Routing and Remote Access Server (RRAS) | Microsoft Learn for more information. You might also benefit by reading more about Roles here: Roles, Role Services, and Features included in Windows Server - Server Core | Microsoft Learn

**How could an attacker exploit the vulnerability?** In a network-based attack, an authenticated attacker with Manage List permissions could execute code remotely on the SharePoint Server.

This vulnerability is only exploitable on Windows Servers that have installed and configured the Routing and Remote Access Service (RRAS) role which is not installed and configured by default. Please see Routing and Remote Access Server (RRAS) | Microsoft Learn for more information. You might also benefit by reading more about Roles here: Roles, Role Services, and Features included in Windows Server - Server Core | Microsoft Learn

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

**According to the CVSS metric, successful exploitation of this vulnerability could lead to total loss of confidentiality (C:H), integrity (I:H), and availability (A:H). What does that mean for this vulnerability?** An attacker who successfully exploits this vulnerability could perform a remote attack that could enable access to the victim's information and the ability to alter information. Successful exploitation could also potentially cause downtime for the targeted environment.

**How could an attacker exploit this vulnerability?** An unauthenticated attacker could exploit the vulnerability by sending a specially crafted request to a Windows Server configured as a Layer-2 Bridge.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** Within a SharePoint site, the attacker must be authenticated, and they would need to have the “Use Remote Interfaces” and “Add and Customize Pages” permissions on a Policy Center site to be able to exploit this vulnerability.

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** The user would have to click on a specially crafted URL to be compromised by the attacker.