Unpatched vulnerability in older PowerPoint versions

Microsoft released recently a security advisory about remote code execution vulnerability in older Microsoft Office PowerPoint programs.

Vulnerability is in these versions of Powerpoint:

Microsoft Office PowerPoint 2000 Service Pack 3
Microsoft Office PowerPoint 2002 Service Pack 3
Microsoft Office PowerPoint 2003 Service Pack 3
Microsoft Office 2004 for Mac

Attack is able to perform using bad PowerPoint file but needs action from users side. One example where to get it could be email attachment.

If PowerPoint version is 2003, Microsoft recommends to use Microsoft Office Isolated Conversion Environment (MOICE) for opening PowerPoint documents as stated in earlier advisory

Microsoft is not sure if fix would be in April updates.