Foxit PhantomPDF WillClose Action Use-After-Free Remote Code Execution Vulnerability

January 25th, 2016
ZDI-16-026 ZDI-CAN-3493

CVE ID

CVSS Score

6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected Vendors

Foxit

Affected Products

PhantomPDF

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF. 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 WillClose action. A specially crafted PDF with a WillClose action can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.

Additional Details

Foxit has issued an update to correct this vulnerability. More details can be found at:
https://www.foxitsoftware.com/support/security-bulletins.php

Disclosure Timeline

  • 2016-01-05 - Vulnerability reported to vendor
  • 2016-01-25 - Coordinated public release of advisory

Credit

AbdulAziz Hariri - HPE Zero Day Initiative

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