Buffer overflow in the ActiveX component (pdf.ocx) for Adobe Acrobat 5.0.5 and Acrobat Reader, and possibly other versions, allows remote attackers to execute arbitrary code via a URI for a PDF file with a null terminator (%00) followed by a long string.

Adobe Reader 6.0 does not properly handle null characters when splitting a filename path into components, which allows remote attackers to execute arbitrary code via a file with a long extension that is not normally handled by Reader, triggering a buffer overflow.