graphite2: multiple font parsing vulnerabilities (Mozilla MFSA 2016-37)

The graphite2::TtfUtil::CmapSubtable12Lookup function in TtfUtil.cpp in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service buffer over-read or possibly have unspecified other impact via a crafted...