Advisory Details

July 9th, 2014

(Pwn2Own) Microsoft On-Screen Keyboard Privilege Escalation Vulnerability

ZDI-14-218
ZDI-CAN-2224

CVE ID CVE-2014-2781
CVSS SCORE 4.6, (AV:L/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of the On-Screen Keyboard. The issue lies in the ability to send input to the On-Screen Keyboard from a low integrity process. An attacker can leverage this vulnerability to elevate privileges and execute code under the context of the On-Screen Keyboard process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/library/security/MS14-039.aspx
DISCLOSURE TIMELINE
  • 2014-03-11 - Vulnerability reported to vendor
  • 2014-07-09 - Coordinated public release of advisory
CREDIT lokihardt@asrt
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