TippingPoint Zero Day Initiative

Unitronics VisiLogic OPLC IDE File Parsing Buffer Overflow Remote Code Execution Vulnerability

ZDI-16-001: January 6th, 2016


CVSS Score

Affected Vendors

Affected Products

    VisiLogic OPLC IDE

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Unitronics VisiLogic OPLC IDE. 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 parsing of vlp files. A specially crafted vlp will overrun a heap buffer and inject values past the end of the heap allocation. An attacker can leverage this vulnerability to execute arbitrary code under the context of local Administrator.

Vendor Response

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

Disclosure Timeline

    2015-05-01 - Vulnerability reported to vendor
    2016-01-06 - Coordinated public release of advisory


This vulnerability was discovered by:
    Steven Seeley of Source Incite