Multiple stack-based buffer overflows in PDFLib allow user-assisted remote attackers to execute arbitrary code via a long filename argument to the PDF_load_image function that results in an overflow in the pdc_fsearch_fopen function, and possibly other vectors.
http://www.securityfocus.com/archive/1/485479/100/0/threaded
http://securityreason.com/securityalert/3495
http://security.gentoo.org/glsa/glsa-200803-17.xml
http://secunia.com/advisories/29304