Advisory Details

February 5th, 2016

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

ZDI-16-123
ZDI-CAN-3131

CVE ID CVE-2016-0855
CVSS SCORE 7.8, AV:N/AC:L/Au:N/C:N/I:N/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 ['20810']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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.
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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