The remote Debian host is missing a security-related update.
Insufficient input sanitising in libwmf, a library to process Windows metafile data, may result in denial of service or the execution of arbitrary code if a malformed WMF file is opened.
Upgrade the libwmf packages. For the oldstable distribution (wheezy), these problems have been fixed in version 0.2.8.4-10.3+deb7u1. For the stable distribution (jessie), these problems have been fixed in version 0.2.8.4-10.3+deb8u1.