Advisory Details

August 14th, 2018

Microsoft Windows dxgkrnl Driver D3DKMTRender Method Untrusted Pointer Dereference Privilege Escalation Vulnerability

CVE ID	CVE-2018-8400
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows remote attackers to escalate privileges on vulnerable installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the D3DKMTRender routine in the dxgkrnl driver. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this vulnerability to escalate privileges to SYSTEM.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8400
DISCLOSURE TIMELINE	2018-05-03 - Vulnerability reported to vendor 2018-08-14 - Coordinated public release of advisory 2018-08-14 - Advisory Updated
CREDIT	RanchoIce and ChenNan of Tencent ZhanluLab

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