Hey, I've been browsing 'overflows' on google, and come across a couple that maybe you could take a look at? I would myself, but personally, I'm not that gifted at exploiting the PSP, nor compiling images.
LibTiff TIFFFetchData Integer Overflow Vulnerability - April 28, 2006
(Effects LibTIFF 3.8 also)
LibTIFF TIFFOpen Buffer Overflow Vulnerability - March 9, 2006
(Effects LibTIFF 3.7.2)
Thanks for looking into these =).