Picasa3.exe in Google Picasa before 3.9.0 Build 137.69 allows remote attackers to trigger memory corruption via a crafted TIFF tag, as demonstrated using a KDC file with a DSLR-A100 model and certain sequences of tags.
https://support.google.com/picasa/answer/53209
http://www.securitytracker.com/id/1029527