Advisory Details

February 5th, 2016

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

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
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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