Advisory Details

June 13th, 2017

(Pwn2Own) Microsoft Windows TdxCreateTransportAddress Buffer Overflow Privilege Escalation Vulnerability

CVE ID	CVE-2017-0296
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 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 tdx.sys networking driver. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vulnerability to escalate privilege to the level of 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-2017-0296
DISCLOSURE TIMELINE	2017-03-19 - Vulnerability reported to vendor 2017-06-13 - Coordinated public release of advisory
CREDIT	pgboy and zhong_sf of Qihoo 360Vulcan Team

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