Fortinet Discovers Microsoft Office Outlook Remote Code Execution Vulnerability
Fortinet's FortiGuard Labs has discovered a remote code execution vulnerability in Microsoft Outlook.
Microsoft Outlook is a personal information manager, which is a part of the Microsoft Office suite. Although it is used mainly as an email application, it also includes a calendar, task manager, contact manager, note taking, journal, and web browsing.
A remote code execution vulnerability is discovered in Microsoft Outlook resulting from its failure to properly handle objects in memory. When parsing a malformed RWZ file, a buffer overflow is triggered in Microsoft Outlook due to insufficient sanitization of the value of the length parameter of the memcpy function that can eventually lead to a remote code execution scenario. The vulnerability exists in an unnamed function in OLMAPI32.dll, which is called by the function OLMAPI32.dll!HrConvertADRLIST.
SolutionsFortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:
Released Oct 24, 2018
Users should apply the solution provided by Microsoft.
Fortinet reported the vulnerability to Microsoft on August 30, 2018.
Microsoft confirmed the vulnerability on September 12, 2018.
Microsoft patched the vulnerability on November 13, 2018.
This vulnerability was discovered by Yonghui Han of Fortinet's FortiGuard Labs.