Foxit Reader Font Parsing Use-After-Free Remote Code Execution Vulnerability

January 25th, 2016
ZDI-16-024 ZDI-CAN-3465

CVE ID

CVSS Score

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

Affected Vendors

Foxit

Affected Products

Foxit 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 font parsing. A specially crafted font embedded in a PDF file can force a dangling pointer to be reused after it has been freed. An attacker could 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

Mario Gomes(@NetFuzzer)

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