This section describes how an attacker might exploit a feature or its configuration, how to implement the countermeasure, and the possible negative consequences of countermeasure implementation.
The following list describes available named pipes and their purpose. These pipes were granted anonymous access in earlier versions of Windows and some legacy applications may still use them. Configure the Network access: Named Pipes that can be accessed anonymously setting to a null value enable the setting but do not specify named pipes in the text box.
This configuration disables null-session access over named pipes, and applications that rely on this feature or on unauthenticated access to named pipes no longer function. This may break trust between Windows Server domains in a mixed mode environment. Skip to main content. This browser is no longer supported. The following table lists the actual and effective default policy values for the most recent supported versions of Windows.
When modifying this user right, the following actions might cause users and services to experience network access issues:. Any change to the user rights assignment for an account becomes effective the next time the owner of the account logs on.
Settings are applied in the following order through a Group Policy Object GPO , which will overwrite settings on the local computer at the next Group Policy update:. This section describes how an attacker might exploit a feature or its configuration, how to implement the countermeasure, and the possible negative consequences of countermeasure implementation.
Users who can connect from their device to the network can access resources on target devices for which they have permission. For example, the Access this computer from the network user right is required for users to connect to shared printers and folders. If this user right is assigned to the Everyone group, anyone in the group can read the files in those shared folders.
This situation is unlikely because the groups created by a default installation of at least Windows Server R2 or Windows 7 do not include the Everyone group. However, if a device is upgraded and the original device includes the Everyone group as part of its defined users and groups, that group is transitioned as part of the upgrade process and is present on the device. Restrict the Access this computer from the network user right to only those users and groups who require access to the computer.
For example, if you configure this policy setting to the Administrators and Users groups, users who log on to the domain can access resources that are shared from servers in the domain if members of the Domain Users group are included in the local Users group. Note If you are using IPsec to help secure network communications in your organization, ensure that a group that includes machine accounts is given this right.
If this policy is not contained in a distributed GPO, this policy can be configured on the local computer by using the Local Security Policy snap-in. This section describes how an attacker might exploit a feature or its configuration, how to implement the countermeasure, and the possible negative consequences of countermeasure implementation.
Passwords that are cached can be accessed by the user when logged on to the device. Although this information may sound obvious, a problem can arise if the user unknowingly runs malicious software that reads the passwords and forwards them to another, unauthorized user. Note: The chances of success for this exploit and others that involve malicious software are reduced significantly for organizations that effectively implement and manage an enterprise antivirus solution combined with sensible software restriction policies.
Regardless of what encryption algorithm is used to encrypt the password verifier, a password verifier can be overwritten so that an attacker can authenticate as the user to whom the verifier belongs.
Therefore, the administrator's password may be overwritten. This procedure requires physical access to the device.
Utilities exist that can help overwrite the cached verifier. By using one of these utilities, an attacker can authenticate by using the overwritten value. Overwriting the administrator's password does not help the attacker access data that is encrypted by using that password. Also, overwriting the password does not help the attacker access any Encrypting File System EFS data that belongs to other users on that device. Overwriting the password does not help an attacker replace the verifier, because the base keying material is incorrect.
Enable the Network access: Do not allow storage of passwords and credentials for network authentication setting.
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