Advisory Details

February 5th, 2016

Advantech WebAccess Dashboard Viewer ImageUploadHandler Unrestricted File Upload Remote Code Execution Vulnerability

ZDI-16-128
ZDI-CAN-3126

CVE ID CVE-2016-0854
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 20736. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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 WebAccess Dashboard Viewer. Insufficient validation within the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to upload arbitrary code (instead of an image) to the server, which will then be executed under the high-privilege context of the IIS AppPool. An attacker can leverage this vulnerability to execute arbitrary code under the context of SYSTEM.

ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01
DISCLOSURE TIMELINE
  • 2015-09-15 - Vulnerability reported to vendor
  • 2016-02-05 - Coordinated public release of advisory
CREDIT rgod
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