Advisory Details

March 19th, 2018

Microsoft Windows Palette Object Race Condition Privilege Escalation Vulnerability

ZDI-18-244
ZDI-CAN-5444

CVE ID CVE-2018-0815
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 win32k.sys driver. During creation of a palette object, a race condition exists due to the failure to lock an object in memory between operations. An attacker can leverage this vulnerability to escalate privileges 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-2018-0815
DISCLOSURE TIMELINE
  • 2017-12-01 - Vulnerability reported to vendor
  • 2018-03-19 - Coordinated public release of advisory
  • 2018-03-19 - Advisory Updated
CREDIT Marcin Wiazowski
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