A vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office. Exploitation requires that the target opens an Office file that contains malicious Jet DB Engine objects. The specific flaw exists within the parsing of a column structure. The DWORD value from the structure that specifies the column count is trusted. If this value is changed, an inline memcpy to the stack can overflow while reading a column name. Typically Jet DB structures are used within MDB files which are considered unsafe. However, it is possible to embed such files within a trusted format, such as an Office Document (.doc). This issue allows for remote code execution under the context of the currently logged in user.
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