TippingPoint Zero Day Initiative

Unitronics VisiLogic OPLC IDE TChart.ITChart ActiveX Control RemoveSeries Remote Code Execution Vulnerability

ZDI-15-578: December 2nd, 2015


CVSS Score

Affected Vendors

Affected Products

    VisiLogic OPLC IDE

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 19815. For further product information on the TippingPoint IPS:

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 the TeeChart object in TeeChart5.ocx. The RemoveSeries method of the object takes a user-supplied integer as an index into an array of object pointers. The index is not checked for validity and this can cause arbitrary memory to be interpreted as an object. An attacker can leverage this vulnerability to execute arbitrary code under the context of the user.

Vendor Response

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

Disclosure Timeline

    2015-04-30 - Vulnerability reported to vendor
    2015-12-02 - Coordinated public release of advisory


This vulnerability was discovered by:
    Steven Seeley of Source Incite