Advisory Details

April 24th, 2014

Advantech WebAccess webvact.ocx AccessCode2 Stack Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2014-0768
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Advantech
AFFECTED PRODUCTS	Advantech WebAccess
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['13268']. 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 installations of Advantech WebAccess. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the webvact.ocx ActiveX Control. The control does not check the length of an attacker-supplied AccessCode2 string before copying it into a fixed length buffer on the stack. This allows an attacker to execute arbitrary code in the context of the browser process.
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-14-079-03
DISCLOSURE TIMELINE	2013-11-06 - Vulnerability reported to vendor 2014-04-24 - Coordinated public release of advisory
CREDIT	Tom Gallagher

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