The remote Debian host is missing a security-related update.
Several vulnerabilities were discovered in Ghostscript, the GPL PostScript/PDF interpreter, which may result in denial of service if a specially crafted Postscript file is processed.
Upgrade the ghostscript packages. For the oldstable distribution (jessie), these problems have been fixed in version 9.06~dfsg-2+deb8u6. For the stable distribution (stretch), these problems have been fixed in version 9.20~dfsg-3.2+deb9u1.