iDefense Security Advisory 05.12.09 – Remote exploitation of multiple stack based buffer overflow vulnerabilities in Microsoft Corp.’s PowerPoint could allow an attacker to execute arbitrary code with the privileges of the current user. The vulnerabilities exist within the importer for PowerPoint 95 format files. This functionality is contained within the PP7X32.DLL. The vulnerabilities occur when reading sound data from a PowerPoint file. In both cases, a value representing a record length is read in from the file. This value is then used to control the number of bytes read into a fixed size stack buffer. There is no check performed to ensure that the buffer can hold the number of bytes specified, which results in a stack buffer overflow. iDefense has confirmed the existence of these vulnerabilities in Office XP SP3, and Office 2000 SP3.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/77466/05.12.09-5.txt
Source: https://packetstormsecurity.com/files/77466/iDEFENSE-Security-Advisory-2009-05-12.5.html