Advisory Details

February 5th, 2016

Advantech WebAccess webvrpcs Service DrawSrv.dll TagGroup strcpy Stack-Based Buffer Overflow Remote Code Execution Vulnerability

ZDI-16-100
ZDI-CAN-3201

CVE ID CVE-2016-0856
CVSS SCORE 9.3, (AV:N/AC:M/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 21170. 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 instances of Advantech WebAccess. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of the 0x280A IOCTL in the DrawSrv subsystem. A stack-based buffer overflow vulnerability exists in a call to strcpy. An attacker can use this vulnerability to execute arbitrary code in the context of an administrator of the 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
  • 2015-09-16 - Vulnerability reported to vendor
  • 2016-02-05 - Coordinated public release of advisory
CREDIT Anonymous
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