Microsoft Word Cascading Style Sheet Vulnerability

Overview

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iPolicy Networks Security Advisory


Date Discovered:	05/13/2008
Severity:	High
Applications Affected:	Microsoft Office 2000 SP3 Microsoft Office XP SP3 Microsoft Office 2003 SP2 Microsoft Office 2003 SP3 Microsoft Office System 2007 Microsoft Office System 2007 SP1 Microsoft Word Viewer 2003 Microsoft Word Viewer 2003 SP3 Microsoft Office 2004 for Mac Microsoft Office 2008 for Mac

Synopsis

Microsoft word is prone to a Cascading Style Sheet (CSS) vulnerability. This vulnerability exists in the way that Microsoft Word handles specially crafted Word files.

Recommended Actions

Update the patches as guided by vendor at :
http://www.microsoft.com/technet/security/bulletin/ms08-026.mspx

Threat Analysis

The vulnerability is caused by a memory handling error when processing CSS values in a specially crafted Word file. The error may corrupt system memory in such a way that an attacker could execute arbitrary code. he vulnerability could allow remote code execution if a user opens a specially crafted Word file that includes a malformed CSS value. An attacker who successfully exploited this vulnerability could take complete control of an affected system.

An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs, view, change, delete data, or create new accounts with full user rights.

References

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1434

Write-up by: Aditya Chaturvedi

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