Microsoft Office Uninitialized Memory Use Vulnerability

An uninitialized memory use vulnerability (CVE-2015-1770) was discovered as the affected application only partially initialized the osf.Sandbox.1 COM object in memory while parsing a crafted Office file. If persuaded to open a crafted Office file, successful exploitation would allow an attacker to run arbitrary code in the context of the user.

Microsoft Office is a suite of desktop applications consisting of Microsoft Word, PowerPoint, Excel, Outlook and various other productivity applications. The applications are affected by an uninitialised memory use vulnerability while parsing a specially crafted Office file as a result of the application only partially initialising the osf.Sandbox.1 COM object in memory.

If persuaded to open the crafted Office file, a successful exploitation would allow an attacker to run arbitrary code in the context of the target application.

The vulnerability exists because Microsoft Office does not properly initialise the osf.Sandbox.1 COM object.

Avoid opening Office files from untrusted sources or view them in Protected-View mode. Alternatively, it is possible to disable the osf.Sandbox ActiveX plugin in Office.

Users should apply MS15-059 updates from Microsoft.

Refer to attached detailed advisory above.