News

Microsoft Releases Two New Security Warnings

Microsoft has released two new security warnings, one regarding Microsoft Windows Media Services and one regarding Microsoft Systems Management Server (SMS). The vulnerability in Windows Media Services could allow denial of service attacks against a streaming media server, and the vulnerability in SMS could allow a user to gain elevated privileges on the local machine.

With Windows Media Services, the handshake sequence between a Windows Media server and a Windows Media Player is asynchronous, because certain resource requests are dependent on the successful completion of previous ones. If the client-side handshake packets are sent in a particular, misordered sequence, with certain timing constraints, the server will attempt to use a resource before it has been initialized and will fail catastrophically, causing the Windows Media Unicast Service to crash. The Windows Media Unicast Service can be put back into normal operating condition by restarting the service, but any sessions that were in effect at the time of the crash would need to be restarted.

Microsoft Windows Media Services 4.0 and 4.1 are affected. The patch for Windows NT Server 4.0 is available at http://download.microsoft.com/download/winmediatech40/Update/4954/NT4/EN-US/WMSU4954_NT4.EXE and the patch for Windows 2000 Server is available at http://download.microsoft.com/download/winmediatech40/Update/4954/NT5/EN-US/WMSU4954_Win2000.EXE.

With SMS, if the SMS 2.0 Remote Control feature has been installed and enabled on a machine, the folder in which the remote agent resides has its permissions set to Everyone Full Control by default. If a malicious user replaced the client code with code of his choosing, it would run automatically in a system context the next time he rebooted the machine and logged on. The vulnerability exists only if the Remote Control feature has been enabled. No other SMS features are affected by it.

Microsoft Systems Management Server 2.0 is affected by this vulnerability. The patch for X86 machines is available at http://www.microsoft.com/Downloads/Release.asp?ReleaseID=18948 and the patch for Alpha machines is available at http://www.microsoft.com/Downloads/Release.asp?ReleaseID=18499. - Isaac Slepner

About the Author

Scott Bekker is editor in chief of Redmond Channel Partner magazine.

Featured

  • Google IDs on Azure Active Directory B2B Service Now at 'General Availability'

    Microsoft announced on Wednesday that users of the Google identity and access service can use their personal log-in IDs with the Azure Active Directory B2B service to access resources as "guests."

  • Top 4 Overlooked Features of a Data Backup Strategy

    When it comes to implementing an airtight backup-and-recovery plan, these are the four must-have features that many enterprises nevertheless tend to forget.

  • Microsoft Bolsters Kubernetes with Azure Confidential Computing

    Microsoft on Tuesday announced various developments concerning the use of Kubernetes, an open source container orchestration solution fostered by Google.

  • Windows Will Have Support for Encrypted DNS

    Microsoft announced this week that the Windows operating system already has support for an encrypted Domain Name System option that promises to add greater privacy protections for Internet connections.

comments powered by Disqus

Office 365 Watch

Sign up for our newsletter.

Terms and Privacy Policy consent

I agree to this site's Privacy Policy.