Advisory Details

February 5th, 2016

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

CVE ID	CVE-2016-0854
CVSS SCORE	10.0, 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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