Advisory Details

January 5th, 2018

Advantech WebAccess DelIcon Directory Traversal File Deletion Vulnerability

ZDI-18-056
ZDI-CAN-5058

CVE ID CVE-2017-16720
CVSS SCORE 5, (AV:N/AC:L/Au:N/C:N/I:N/A:P)
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 29684. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to delete arbitrary files on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the DelIcon method in gmicons.asp. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to delete files accessible to the web service.

VENDOR RESPONSE Advantech has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-18-004-02
DISCLOSURE TIMELINE
  • 2017-08-07 - Vulnerability reported to vendor
  • 2018-01-05 - Coordinated public release of advisory
CREDIT Zhou Yu
BACK TO ADVISORIES