Microsoft Security Response Center

**According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?** The word **Remote** in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. The vulnerable endpoint is only available over the local VM interface as all external communication is blocked. This means an attacker needs to execute code from the local machine to exploit the vulnerability.

**Why are there two different impacts in the Security Updates table?** An attacker could potentially exploit this vulnerability to elevate privileges from a client-side application sandbox in earlier Microsoft operating systems. However, mitigation technologies in later Microsoft operating systems make this more difficult. For this reason, this vulnerability has two different impact ratings.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker with physical access to an unlocked device could bypass the application's biometric authentication, which effectively disables the application lock and gives the attacker full access.

**How could an attacker exploit this vulnerability?** A locally authenticated attacker could manipulate information on the Sysinternals services to achieve elevation from local user to SYSTEM admin.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** Any authenticated user could trigger this vulnerability. It does not require admin or other elevated privileges.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

**I am running SharePoint Enterprise Server 2013 Service Pack 1. Do I need to install both updates that are listed for SharePoint Enterprise Server 2013 Service Pack 1?** No. The Cumulative update for SharePoint Server 2013 includes the update for Foundation Server 2013. Customers running SharePoint Server 2013 Service Pack 1 can install the cumulative update or the security update, which is the same update as for Foundation Server 2013. Please note that this is a clarification of the existing servicing model for SharePoint Server 2013 and applies for all previous updates.

**According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?** Successful exploitation of this vulnerability could allow a Hyper-V guest to affect the functionality of the Hyper-V host.

**What type of information could be disclosed by this vulnerability?** Exploiting this vulnerability could allow the disclosure of initialized or uninitialized memory in the process heap.

**What type of privileges could an attacker gain through this vulnerability?** A domain user could use this vulnerability to elevate privileges to SYSTEM assigned integrity level.