Microsoft Security Bulletin MS03-050 - A security vulnerability exists in Microsoft Excel that could allow malicious code execution. This vulnerability exists because of the method Excel uses to check the spreadsheet before reading the macro instructions. If successfully exploited, an attacker could craft a malicious file that could bypass the macro security model. Another security vulnerability exists in Microsoft Word that could allow malicious code execution. This vulnerability exists due to to the way Word checks the length of a data value (Macro names) embedded in a document. If a specially crafted document were to be opened it could overflow a data value in Word and allow arbitrary code to be executed.
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