Apple Mac OS X DFont Memory Corruption Remote Code Execution Vulnerability

ID ZDI-15-011
Type zdi
Reporter Gaurav Baruah
Modified 2015-11-09T00:00:00


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Mac OSX. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of a dfont file. When processing a malformed dfont file, a specified value is parsed from the file and passed to the memmove API call which can cause memory corruption. A remote attacker can use this to execute remote code under the context of the user.