Advisory Details

May 10th, 2016

(Pwn2Own) Microsoft Windows PFFOBJ::bDeleteLoadRef Font Use-After-Free Privilege Escalation Vulnerability

ZDI-16-281
ZDI-CAN-3618

CVE ID CVE-2016-0175
CVSS SCORE 6.9, (AV:L/AC:M/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 24548. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows local 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 fonts. The issue lies in the failure to remove references to a font after freeing associated resources. An attacker can leverage this vulnerability to escalate privileges and execute code within the context of SYSTEM.

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/ms16-062.aspx
DISCLOSURE TIMELINE
  • 2016-03-12 - Vulnerability reported to vendor
  • 2016-05-10 - Coordinated public release of advisory
CREDIT Tencent PC Manager
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