Microsoft Excel is the spreadsheet application within Microsoft Office.
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 Excel parses a specially crafted SXLI record in an Excel file. This record is used to specify pivot table information for a chart. When parsing a specific field, certain invalid values can trigger a memory corruption vulnerability. This can result in the execution of arbitrary code.
Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user opening the file. To exploit this vulnerability, an attacker needs to convince a user to open a malicious file. Attackers typically accomplish this by e-mailing a targeted user the file or hosting the file on a Web page. Exploitation of this vulnerability is relatively complex.
The following Microsoft products are vulnerable:
The vulnerability occurs in the core parsing code of Excel and this code cannot be disabled; however, it is possible to disable the opening of the older binary format files and use MOICE to convert the file to the newer XML-based format. Information about these workarounds is available in the Microsoft bulletin below.
Microsoft Corp. has addressed this vulnerability with the release of updates to Excel. More information can be found at the following URL:
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2012-0184 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
09/22/2011 Initial Vendor Notification
09/22/2011 Initial Vendor Reply
05/08/2012 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Omair.
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Copyright © 2012 Verisign, Inc.
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