For customers using Windows Defender, we released an update earlier today which detects this threat as Ransom:Win32/WannaCrypt.For those organizations who have not yet applied the security update, we suggest you immediately deploy Microsoft Security Bulletin MS17-010. Those who have Windows Update enabled are protected against attacks on this vulnerability. In March, we released a security update which addresses the vulnerability that these attacks are exploiting.
Customers running Windows 10 were not targeted by the attack today. Additionally, we are taking the highly unusual step of providing a security update for all customers to protect Windows platforms that are in custom support only, including Windows XP, Windows 8, and Windows Server 2003. This blog spells out the steps every individual and business should take to stay protected. Microsoft worked throughout the day to ensure we understood the attack and were taking all possible actions to protect our customers. Seeing businesses and individuals affected by cyberattacks, such as the ones reported today, was painful. Today many of our customers around the world and the critical systems they depend on were victims of malicious “WannaCrypt” software.
UpdatePromptSettings = 0 (DWORD) or not defined (default setting)įor more in depth guidance, please see KB5005010: Restricting installation of new printer drivers after applying the Jupdates and CVE-2021-34527.
NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting).HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint.If the registry keys documented exist, in order to secure your system, you must confirm that the following registry keys are set to 0 (zero) or are not present:.If the registry keys documented do not exist, no further action is required.After applying the security update, review the registry settings documented in the CVE-2021-34527 advisory.The update will not change existing registry settings In ALL cases, apply the CVE-2021-34527 security update.We recommend that customer follow these steps immediately: Microsoft has focused its efforts on making customer protections available as quickly as possible and our guidance has been updated as our understanding of the issue has evolved. All reports we have investigated have relied on the changing of default registry setting related to Point and Print to an insecure configuration. Our investigation has shown that the OOB security update is working as designed and is effective against the known printer spooling exploits and other public reports collectively being referred to as PrintNightmare.
We encourage customers to update as soon as possible.ĬVE-2021-34527 – Windows Print Spooler Remote Code Execution Vulnerability.įollowing the out of band release (OOB) we investigated claims regarding the effectiveness of the security update and questions around the suggested mitigations. Updates were released on July 6 and 7 which addressed the vulnerability for all supported Windows versions. On Tuesday July 6, 2021, Microsoft issued CVE-2021-34527 regarding a Windows Print Spooler vulnerability.