Technical Information

Brief overview of the risk:
A vulnerability exists in the way Excel parses record values when loading Excel files into memory. Depending on the attack scenario, the vulnerability could lead to remote code execution on a user’s local Excel client, or it could lead to elevation of privilege within a SharePoint Server.
Detailed Information on the risk:
This security update resolves four privately reported vulnerabilities in Microsoft Office Excel that could allow remote code execution if a user opens a specially crafted Excel file. An attacker who successfully exploited these vulnerabilities could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.Further information on this exploit is available at : MS08-043