This host is missing an important security update according to Microsoft Bulletin MS13-041.

Successful exploitation could allow an attacker could execute arbitrary code in the context of the current user by sharing specially crafted content, such as a file or a program, as a presentation in a Lync or Communicator session and then convince a user to view or share the specially crafted content. Impact Level: System/Application

Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://technet.microsoft.com/en-us/security/bulletin/ms13-041

A use-after-free error within the Lync control can be exploited to dereference already freed memory.

Microsoft Lync Server 2013 (Web Components Server)

• http://secunia.com/advisories/53363/
• http://support.microsoft.com/kb/2827750
• http://support.microsoft.com/kb/2827753
• https://technet.microsoft.com/en-us/security/bulletin/ms13-041

---

Updated on 2015-03-25