Win XP Pro x64 Edition Benutzerprofil auf Server 2003 Standard Edition 32 bit

Security Certificate Services: Effects of security enhancements to the DCOM protocol
Windows Server 2003 SP1 introduces enhanced default security settings for the DCOM
protocol. Specifically, SP1 introduces more precise rights that give an administrator
independent control over local and remote permissions for launching, activating, and
accessing COM servers.
Windows Server 2003 Certificate Services provides enrollment and administration services by
using the DCOM protocol. Certificate Services provides several DCOM interfaces to make
these services available. For correct access and usage of these services, Certificate Services
assumes that its DCOM interfaces are set to permit remote activation and access permissions.
However, because of the enhanced default security settings for DCOM that are introduced by
SP1, you may have to update these security settings to make sure of the continued availability
of these services after you install SP1. The following information explains how to do this.
By default, all DCOM interfaces in Windows Server 2003 SP1 are configured to grant remote
access permissions, remote launch permissions, and remote activation permissions only to
administrators. However, when you upgrade to Windows Server 2003 SP1, security
configuration changes are made to the global DCOM interface and to the CertSrv Request
DCOM interface. These changes are made to enable Certificate Services to work correctly.
Note that any changes that have been made to the CertSrv Request DCOM interface security
settings before the installation of SP1 will be lost. The SP1 installation procedure resets all
previous security settings in the CertSrv Request DCOM interface to their default settings.
During the SP1 installation process, Certificate Services automatically updates the DCOM
security settings as follows:
• CertSrv Request DCOM interface:
• The Everyone security group is granted local and remote access permissions.
• The Everyone security group is granted local and remote activation permissions.
• The Everyone security group is not granted local or remote launch permissions.
• DCOM Computer Restriction Settings:
• A new security group, CERTSVC_DCOM_ACCESS, is automatically created.
If the certification authority is installed on a member server, CERTSVC_DCOM_ACCESS is
a computer local group, and the Everyone security group is added to it.
If the certification authority is installed on a domain controller, CERTSVC_DCOM_ACCESS
is a domain local group. The Domain Users security group and the Domain Computers
security group from the certification authority’s domain are added to it.
• The CERTSVC_DCOM_ACCESS security group is granted local and remote access
permissions.
• The CERTSVC_DCOM_ACCESS security group is granted local and remote activation
permissions.
• The CERTSVC_DCOM_ACCESS security group is not granted local or remote launch
permissions.
Note that if the certification authority is installed on a domain controller, and the enterprise
is made up of more than one domain, Certificate Services cannot automatically update the
DCOM security settings for enrollees from outside the certification authority’s domain.
Therefore, these enrollees will be denied enroll access to the certification authority.
To resolve this issue, you must manually add the users to the CERTSVC_DCOM_ACCESS
security group. Because the CERTSVC_DCOM_ACCESS security group is a domain local
group, you can add only domain groups to it. For example, if users and computers from
another domain, a domain named Contoso, have to enroll with the certification authority, you
must manually add the Contoso\Domain Users group and the Contoso\Domain Computers
group to the CERTSVC_DCOM_ACCESS security group.
If any enrollees that should be authorized by the certification authority are denied
authorization after the installation of SP1, you can have Certificate Services update the
DCOM security settings again. To do this, run the following commands at the command
prompt in the following order. Press ENTER after each command.
1. certutil –setreg SetupStatus –SETUP_DCOM_SECURITY_UPDATED_FLAG
2. net stop certsvc
3. net start certsvc
The DCOM_SECURITY_UPDATED_FLAG is an internal Certificate Services registry flag
that indicates that the DCOM security settings were updated completely and successfully.
Certificate Services checks this flag every time that it is started. The commands in the
previous list reset the flag and then stop and start Certificate Services, causing it to update
the DCOM security settings again.