- #Dcom startup time registry value update#
- #Dcom startup time registry value software#
- #Dcom startup time registry value windows#
Hardening changes in DCOM were required for CVE-2021-26414.
#Dcom startup time registry value software#
DCOM is used for communication between the software components of networked devices. Ps:///topic/kb5004442-manage-changes-for-windows-dcom-server-security-feature-bypass-cve-2021-26414-f1400b52-c141-43d2-941e-37ed901c769The Distributed Component Object Model (DCOM) Remote Protocol is a protocol for exposing application objects using remote procedure calls (RPCs). Ps:///windows/win32/rpc/authentication-level-consta Ps:///en-us/windows/win32/rpc/authentication-level-consta
#Dcom startup time registry value windows#
KB5004442: Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414)ĬVE-2021-26414: Windows DCOM Server Security Feature Bypass \: Distributed Component Object Model (DCOM) Remote Protocol | Microsoft Docs It is important to ensure proper testing for this change.
#Dcom startup time registry value update#
If issues are encountered during testing, contact the vendor for the affected client or server software for an update or workaround, and see the DCOM errors supported by all Windows platforms. The client device can be traced from the server-side event log and the client-side event logs can be used to find the application. The system will log these events if it detects that a DCOM client application is trying to activate a DCOM server using an authentication level that is less than RPC_C_AUTHN_LEVEL_PKT_INTEGRITY. To help identify the applications that might have compatibility issues after we enable DCOM security hardening changes, we added new DCOM error events in the System log:Įvent 10036 is logged on the DCOM server and contains the IP address of the DCOM client.Įvents 1008 are logged on the DCOM client, not the DCOM Server machine. Note: Enabling the registry key above will make DCOM servers enforce an Authentication-Level of RPC_C_AUTHN_LEVEL_PKT_INTEGRITY or higher for activation.
You must enter Value Data in hexadecimal format.ĭevices must be restarted after setting this registry key, for it to take effect. If this value is not defined, it will default to disabled. Value Data: default = 0x00000000 means disabled. Value Name: "RequireIntegrityActivationAuthenticationLevel" Path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\AppCompat By this point, you must resolve any compatibility issues with the hardening changes and applications in your environment.ĭuring the timeline phases in which hardening changes can be enabled or disabled (prior to March 14, 2023), users can use the following registry key: Masecurity update: Hardening changes are enabled by default with no ability to disable them. Jsecurity update: Hardening changes are enabled by default but with the ability to disable them using a registry key. Jsecurity update: Hardening changes are disabled by default but with the ability to enable them using a registry key. Refer to the below timeline to understand the progressive hardening coming to DCOM. Note: We recommend that you update your devices to the latest security update available to take advantage of the advanced protections from the latest security threats. Starting today, June 14, 2022, all DCOM clients attempting to establish connections to DCOM servers which have applied updates released June 14, 2022, or later, must either support an authentication level of RPC_C_AUTHN_LEVEL_PKT_INTEGRITY and higher or temporarily disable that enforcement by using the RequireIntegrityActivationAuthenticationLevel registry key in the DCOM server. Windows update releases starting June 2021 address a vulnerability in the DCOM remote protocol by progressively increasing security hardening in DCOM. Updated June 15: A correction has been made to the timeline dates.Īs previously announced, security requirements have increased for Windows devices that use the Distributed Component Object Model (DCOM) or Remote Procedure Call (RPC) server technologies.
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