iDefense Security Advisory 02.12.08 - Remote exploitation of a heap corruption vulnerability in Microsoft Corp.'s Works Converter, as included with Microsoft Office, could potentially allow an attacker to execute arbitrary code as the current user. This vulnerability stems from improper input validation of OLE structures within wkcvqd01.dll when converting a Microsoft Works document (WPS extension) to Rich Text Format (RTF). When certain fields are modified, such as the length or count values, heap corruption can occur. This leads to a potentially exploitable condition. iDefense has confirmed that wkcvqd01.dll version 7.03.0616.0, as included with Microsoft Office 2003, is vulnerable to this issue. Older versions are assumed to be vulnerable as well. Additionally, Microsoft Works itself is suspected to be vulnerable.
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