Fortinet Discovers Microsoft Word RTF File Handling Memory Corruption Vulnerability
Fortinet's FortiGuard Labs has discovered a memory corruption vulnerability in Microsoft Word.
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.
The memory corruption vulnerability is caused by an object type confusion. It exists because Microsoft Word improperly handles a specially crafted Rich Text File (RTF) document. The vulnerability can be triggered when bogus "listoverride" control word is used within the RTF document. As a result, it can lead to arbitrary code execution upon successful exploitation when the crafted document is opened using the vulnerable Microsoft Word.
SolutionsFortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:
Released Mar 13, 2018
Users should apply the solution provided by Microsoft.
Fortinet reported the vulnerability to Microsoft on December 28, 2017.
Microsoft confirmed the vulnerability on January 12, 2018.
Microsoft patched the vulnerability on March 13, 2018.