Advisory Details

February 5th, 2016

Advantech WebAccess webvrpcs Service BwpAlarm.dll ProjectName strcat Stack-Based Buffer Overflow Remote Code Execution Vulnerability

ZDI-16-059
ZDI-CAN-3242

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 21048. 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 0x11184 IOCTL in the BwpAlarm subsystem. A stack-based buffer overflow vulnerability exists in a call to strcat using the ProjectName parameter. 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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