Advisory Details

June 29th, 2016

Foxit Reader FlateDecode Use-After-Free Remote Code Execution Vulnerability

ZDI-16-394
ZDI-CAN-3671

CVE ID
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Foxit
AFFECTED PRODUCTS Reader
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader. 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 FlateDecode. A specially crafted PDF with a FlateDecode stream 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.

VENDOR RESPONSE 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
  • 2016-04-07 - Vulnerability reported to vendor
  • 2016-06-29 - Coordinated public release of advisory
CREDIT Rocco Calvi and Steven Seeley of Source Incite
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