Advisory Details

June 8th, 2018

(Pwn2Own) Microsoft Windows D3DKMTCreateDCFromMemory Memory Corruption Privilege Escalation Vulnerability

CVE ID	CVE-2018-8164
CVSS SCORE	7.2, AV:L/AC:L/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows local 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 creation of a device context from memory using the D3DKMTCreateDCFromMemory API. When processing the width parameter, the process does not properly validate user-supplied data, which can result in a memory corruption condition. 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-2018-8164
DISCLOSURE TIMELINE	2018-03-18 - Vulnerability reported to vendor 2018-06-08 - Coordinated public release of advisory 2018-06-08 - Advisory Updated
CREDIT	Richard Zhu (fluorescence)

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