Fortinet Discovers Microsoft Office RTF File Handling Memory Corruption Vulnerability
Fortinet's FortiGuard Labs has discovered a memory corruption vulnerability in Microsoft Office.
Microsoft Office is an office suite of applications, servers and services. It was first announced by Microsoft in 1988. The first version of Office contained Microsoft Word, Microsoft Excel and Microsoft PowerPoint. Over the years, Office applications have grown substantially closer with shared features such as a common spell checker, OLE data integration and Visual Basic for Applications scripting language. Microsoft also positions Office as a development platform for line-of-business software under the Office Business Applications brand.
A memory corruption vulnerability has been identified in Microsoft Office when it fails to parse RTF documents correctly. Successful exploitation of this issue could allow malicious users to create remote code execution scenarios. The underlying problem involves a typical heap overflow caused by a user-supplied value which is copied into a buffer allocated based on a user-supplied length.
SolutionsFortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:
Released Jan 07, 2016
Users should apply the solution provided by Microsoft.
All major Office versions for both Windows and Mac OS X are affected by this vulnerability.
This vulnerability was discovered by Kai Lu of Fortinet's FortiGuard Labs.