Advisory Details

August 1st, 2017

Mitsubishi Electric E-Designer BEModbus Driver Configuration ClockDevice Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2017-9638
CVSS SCORE	9.3, AV:N/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Mitsubishi Electric
AFFECTED PRODUCTS	E-Designer
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['24898']. 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 Mitsubishi Electric E-Designer. 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 processing of a driver configuration file when initializing the BEModbus component. When parsing the property ClockDevice, the process fails to properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute arbitrary code in the context of the Administrator.
ADDITIONAL DETAILS	Mitsubishi Electric has issued an update to correct this vulnerability. More details can be found at: https://ics-cert.us-cert.gov/advisories/ICSA-17-213-01
DISCLOSURE TIMELINE	2016-05-31 - Vulnerability reported to vendor 2017-08-01 - Coordinated public release of advisory
CREDIT	rgod

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