TippingPoint Zero Day Initiative
 

Advantech WebAccess webvrpcs Directory Traversal Remote Code Execution Vulnerability

ZDI-18-024: January 5th, 2018

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29657. For further product information on the TippingPoint IPS:

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of the 0x2711 IOCTL in the webvrpcs process. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this functionality to execute code under the context of Administrator.

Vendor Response

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

Disclosure Timeline

    2017-09-06 - Vulnerability reported to vendor
    2018-01-05 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Steven Seeley (mr_me) of Offensive Security