Microsoft Windows Font Subsetting Integer Overflow Remote Code Execution Vulnerability

ID ZDI-18-943
Type zdi
Reporter Pengsu Cheng of Trend Micro Security Research
Modified 2018-06-22T00:00:00


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 FontSub.dll module. Crafted data in a font file can trigger an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute under the context of the current process.