The ColorChanger::GetColorFromStack function in colorchanger.cpp in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.Referenceshttps://blogs.gentoo.org/ago/2017/03/02/podofo-null-pointer-dereference-in-colorchangergetcolorfromstack-colorchanger-cpp/