SRC-2019-0029 : Foxit Reader PDF Printer proxyDoAction opcode 0x100000 Stack Buffer Overflow Elevation of Privilege Vulnerability

CVE ID:

CVE-2018-20316

CVSS Score:

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

Affected Vendors:

Foxit

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 with opcode 0x100000. The issue results from the lack of proper validation of user-supplied data when input, 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:
https://www.foxitsoftware.com/support/security-bulletins.php

Disclosure Timeline:

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

Credit:

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