Microsoft Security Response Center

**According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L),but lead to no loss of availability (A:N) and integrity (I:N)? What does that mean for this vulnerability?** An attacker who successfully exploited the vulnerability could view some sensitive information (Confidentiality) but not all resources within the impacted component may be divulged to the attacker. The attacker cannot make changes to disclosed information (Integrity) or limit access to the resource (Availability).

**According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?** In a GPU paravirtualization scenario, an attacker who successfully exploited this vulnerability could traverse the guest’s security boundary to gain access to the host environment.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is one byte of kernel memory could be leaked back to the attacker.

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

**What type of information could be disclosed by this vulnerability?** An attacker who successfully exploited this vulnerability could view Virtual Trust Level 1 (VTL1) data from Virtual Trust 0 (VTL0) which is the least privileged level.

Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.

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

Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.

**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.

Double free in Windows Remote Procedure Call Interface Definition Language (IDL) allows an authorized attacker to elevate privileges locally.