TippingPoint Zero Day Initiative
 

Advantech WebAccess BwPSLinkZip Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-18-053: 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 parsing of the command line in the BwPSLinkZip utility. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. 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

    2017-08-04 - 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