An elevation of privilege vulnerability exists in the Windows redirected drive buffering system (rdbss.sys) when the operating system improperly handles specific local calls within Windows 7 for 32-bit systems. When this vulnerability is exploited within other versions of Windows it can cause a denial of service, but not an elevation of privilege. To exploit this vulnerability, a low-level authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by correcting how rdbss.sys handles these local calls.
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