Stack-based buffer overflow in the GoAhead Web Server on Schneider Electric Modicon M340 PLC BMXNOx and BMXPx devices allows remote attackers to execute arbitrary code via a long password in HTTP Basic Authentication data.
https://ics-cert.us-cert.gov/advisories/ICSA-15-351-01
http://www.securityfocus.com/bid/79622
http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2015-344-01