TippingPoint Zero Day Initiative

Advantech WebAccess Dashboard Viewer addFolder Directory Traversal Arbitrary File Deletion Denial of Service Vulnerability

ZDI-16-123: February 5th, 2016


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 20810. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to deny service to all users on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within the addFolder script allows unauthenticated callers to overwrite key system files so that access to the functionality of WebAccess is completely blocked to all users.

Vendor Response

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

Disclosure Timeline

    2015-09-15 - Vulnerability reported to vendor
    2016-02-05 - Coordinated public release of advisory


This vulnerability was discovered by: