From ciac@rumpole.llnl.gov Thu Mar 30 04:34:27 2000 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Wed, 29 Mar 2000 14:26:08 -0800 (PST) Subject: CIAC Bulletin K-029: Microsoft "Registry Permissions" Vulnerability [ For Public Release ] __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Microsoft "Registry Permissions" Vulnerability March 28, 2000 17:00 GMT Number K-029 ______________________________________________________________________________ PROBLEM: Vulnerabilities exist in the registry of Windows NT 4.0 platforms. These vulnerabilities involve three sets of registry keys whose default permissions are too permissive. These three key sets are not related to each other except by the fact that their permissions should be tightened. PLATFORM: Microsoft NT 4.0 Workstation, Microsoft NT 4.0 Server, Microsoft NT 4.0 Server Enterprise Edition, and Microsoft NT 4.0 Server Terminal Server Edition. DAMAGE: The permissions may allow a malicious user who could interactively log onto a target machine to: Cause code to run in a local system context, cause code to run the next time another user logged onto the same machine, or disable the security protection for a previously-reported vulnerability. SOLUTION: Apply the patch for appropriate hardware. Intel: www.microsoft.com/downloads/release.asp?ReleaseID=19172 Alpha: www.microsoft.com/downloads/release.asp?ReleaseID=19173 ______________________________________________________________________________ VULNERABILITY The risk is medium. The intruder needs to already have access ASSESSMENT: to the system. The malicious code that is ran could elevate the users rights to Administrator. ______________________________________________________________________________ http://www.ciac.org/ciac/bulletins/k-029.shtml ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Microsoft for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. 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