Some vulnerabilities have been reported in Microsoft Excel, which can be exploited by malicious people to compromise a user's system.

1) An error while validating an index value in certain records (e.g. NAME records) can be exploited to corrupt memory via a specially crafted Excel Spreadsheet (XLS) file.

2) An unspecified error in the processing of Excel records can be exploited to corrupt memory via a specially crafted XLS file.

3) An unspecified error in the processing of Excel formulas can be exploited to corrupt memory via a specially crafted XLS file.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.

Solution
Apply patches.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Dyon Balding, Secunia Research
2) An anonymous person via iDefense Labs.
3) The vendor credits Claes M Nyberg, signedness.org.

Changelog
Further details available to Secunia VIM customers

Original Advisory
MS08-074 (KB959070):
http://www.microsoft.com/technet/security/Bulletin/MS08-074.mspx

Secunia Research:
http://secunia.com/secunia_research/2008-36/

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=763

Deep Links
Links available to Secunia VIM customers