Microsoft Excel Featheader buffer overflow exploit that leverages the vulnerability noted in MS09-067.
d8819693a6d8e59e92d65180638700bc847187637b8b54ba49a9da9ce54a19ffThis Metasploit module exploits a vulnerability in the handling of the FEATHEADER record by Microsoft Excel. Revisions of Office XP and later prior to the release of the MS09-067 bulletin are vulnerable. When processing a FEATHEADER (Shared Feature) record, Microsoft used a data structure from the file to calculate a pointer offset without doing proper validation. Attacker supplied data is then used to calculate the location of an object, and in turn a virtual function call. This results in arbitrary code exection. NOTE: On some versions of Office, the user will need to dismiss a warning dialog prior to the payload executing.
9b3639959e436c2af63dd333ef3f91333a796f538dda29fc89a0fd315c002e96iDefense Security Advisory 11.10.09 - Remote exploitation of a memory corruption vulnerability in Microsoft Corp.'s Excel could allow an attacker to execute arbitrary code with the privileges of the current user. The vulnerability occurs when parsing a FEATHEADER record within an Excel file. This record is used to store information common to multiple other records, and was introduced with Excel 2002 (XP). When certain fields of this record are set to a trigger value, it is possible to corrupt memory in such a way that the next 4 bytes in the record are treated as an object pointer. This pointer is then used to make a virtual function call, which results in the execution of arbitrary code. iDefense has confirmed the existence of this vulnerability in Excel versions 2007, 2003, and XP. The record that causes the vulnerability is not supported by Excel 2000, so it is not affected by this vulnerability.
5f80963ddf2ce93ca1f29af19a4ef71104925c85a3890129ab19e9b97edbffb6Zero Day Initiative Advisory 09-083 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. User interaction is required to exploit this vulnerability in that the target must open a malicious spreadsheet. The specific flaw exists in the handling of Shared Feature Header (0x867) tags in an Excel BIFF file format. When processing the cbHdrData size element of the FEATHEADER it is possible to directly control the distance of a calculated pointer. This condition can be leveraged successfully to execute arbitrary code under the context of the currently logged in user.
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