#vulnerability

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM 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.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** Any authenticated attacker 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?** An attacker is required to compromise the credential of a victim who has been assigned the role of “Cluster Admin” or “Cluster Operator” by an administrator prior to attempting to exploit the vulnerability.

**According to the CVSS metric, user interaction is required (UI:R) and privileges required are none (PR:N). What does that mean for this vulnerability?** An unauthorized attacker must wait for a user to initiate a connection.

**What type of information could be disclosed by this vulnerability?** An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.

**Is there a prerequisite for installing the security update?** Yes. For **Windows Server 2012 R2 only**, to apply this update, you must have KB2919355 installed.

**According to the CVSS metrics, successful exploitation of this vulnerability does not impact confidentiality (C:N), but has major impact on integrity (I:H) and availability (A:H). What does that mean for this vulnerability?** Exploitation of this vulnerability does not disclose any confidential information but allows an attacker to modify or delete files containing data which could cause the service to become unavailable.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**How could an attacker exploit this vulnerability?** An attacker could exploit a use after free vulnerability within the OS SAPI component to execute arbitrary code in the context of the compromised user to disclose sensitive information, compromise system integrity or impact the availability of the victim's system.