Advisory Details

February 10th, 2015

Microsoft Windows WM_SYSTIMER Kernel Elevation of Privilege Vulnerability

ZDI-15-012
ZDI-CAN-2549

CVE ID CVE-2015-0003
CVSS SCORE 6.2, (AV:L/AC:H/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS


This vulnerability allows local attackers to elevate to System privileges on vulnerable installations of Microsoft Windows. This vulnerability requires the ability to run arbitrary unprivileged code.

The specific flaw exists within the handling of the WM_SYSTIMER message. By malforming the window handle in the message, an attacker is able to cause the kernel to write to a controlled address. An attacker could leverage this to execute arbitrary code in the context of the System.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/library/security/MS15-010
DISCLOSURE TIMELINE
  • 2014-10-09 - Vulnerability reported to vendor
  • 2015-02-10 - Coordinated public release of advisory
CREDIT Marcin Wiazowski
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