The Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.5.4 proceeds with adding to length values without validating the original values, which allows remote attackers to cause a denial of service (integer overflow and heap-based buffer overflow) or possibly have unspecified other impact via a crafted Mac font.<a href=http://cwe.mitre.org/data/definitions/190.html>CWE-190: Integer Overflow or Wraparound</a> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9674
