PoDoFo::Impose::PdfTranslator::setSource() in pdftranslator.cpp in PoDoFo 0.9.6 has a NULL pointer dereference that can (for example) be triggered by sending a crafted PDF file to the podofoimpose binary. It allows an attacker to cause Denial of Service (Segmentation fault) or possibly have unspecified other impact.
https://sourceforge.net/p/podofo/tickets/40/
https://github.com/mksdev/podofo/commit/1400a9aaf611299b9a56aa2abeb158918b9743c8
https://github.com/jjanku/podofo/commit/ada821df68fb0bf673840ed525daf4ec709dbfd9