SRC-2019-0025 : Foxit Reader PDF Printer proxyDoAction opcode Stack Buffer Overflow Elevation of Privilege Vulnerability



CVSS Score:

4.5, (AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)

Affected Vendors:


Affected Products:

Foxit Reader

Vulnerability Details:

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Foxit Reader. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the processing of proxyDoAction requests. The issue results from the lack of proper validation of user-supplied data when processing opcodes, which can result in a stack based buffer overflow. An attacker can leverage this vulnerability to escalate privileges and execute code at medium integrity.

Vendor Response:

Foxit has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline:

  • 2018-12-19 – Sent to and verified by Foxit
  • 2019-04-16 – Coordinated public release of advisory

Proof of Concept:



This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite