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OVERVIEW This updated advisory is a follow-up to the original advisory titled ICSA-14-086-01A Schneider Electric Serial Modbus Driver Buffer Overflow that was published March 27, 2014, on the NCCIC/ICS-CERT web site. Carsten Eiram of Risk-Based Security has identified a stack-based buffer overflow vulnerability in Schneider Electric’s Serial Modbus Driver that affects 11 Schneider Electric products. Schneider Electric has produced patches that mitigate this vulnerability for some of the products listed below.

This vulnerability can be exploited remotely. Download cccam 2 1 4 ipk. STACK-BASED BUFFER OVERFLOW The Modbus Serial Driver creates a listener on Port 27700/TCP. When a connection is made, the Modbus Application Header is first read into a buffer. If a large buffer size is specified in this header, a stack-based buffer overflow results. A second overflow problem can then be exploited by overwriting the return address, allowing the attacker to execute arbitrary code with the permission of the user running the software. CVE-2013-0662 has been assigned to this vulnerability.

A CVSS v2 base score of 9.3 has been assigned; the CVSS vector string is (AV:N/AC:M/Au:N/C:C/I:C/A:C). VULNERABILITY DETAILS EXPLOITABILITY This vulnerability can be remotely exploited. EXISTENCE OF EXPLOIT No known public exploits specifically target this vulnerability. DIFFICULTY An attacker with a high skill would be able to exploit this vulnerability. MITIGATION Schneider Electric has released a security notification with further information on this vulnerability and how to mitigate it:. Schneider Electric recommends that products that use this driver be updated with the latest version of software.

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Download documents for PowerSuite - Configuration Software for Altivar, Altistart & TeSys. Download documents for PowerSuite - This is a legacy product. Schneider Electric USA Website. Welcome to our website. To view product availability in a specific country, select from the country list below.