The MITRE CVE dictionary describes this issue as:
Integer overflow in the create_surface_from_thumbnail_data function in glib/poppler-page.cc in Poppler 0.x allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted PDF document that triggers a heap-based buffer overflow. NOTE: some of these details are obtained from third party information.
Find out more about CVE-2009-3607 from the
MITRE CVE dictionary dictionary and
Not vulnerable. This issue did not affect the version of poppler as shipped with Red Hat Enterprise Linux 5.