The remote Debian host is missing a security-related update.
Multiple vulnerabilities have been found in the Graphite font rendering engine which might result in denial of service or the execution of arbitrary code if a malformed font file is processed.
Upgrade the graphite2 packages. For the oldstable distribution (wheezy), these problems have been fixed in version 1.3.5-1~deb7u1. For the stable distribution (jessie), these problems have been fixed in version 1.3.5-1~deb8u1.