Schneider Electric InduSoft Web Studio / InTouch Machine Edition Opcode 50 mbstowcs() Stack Overflow

Critical Nessus Plugin ID 109280

Synopsis

The Schneider Electric InduSoft Web Studio or InTouch Machine Edition is affected by a remote code execution vulnerability.

Description

The Schneider Electric InduSoft Web Studio (IWS) or InTouch Machine Edition (ITME) running on the remote host is affected by a remote code execution vulnerability due to a stack overflow condition when handling Opcode 50 in the TCPIP server listening on the default port 1234. An unauthenticated, remote attacker can exploit this issue, via a specially crafted packet, to execute arbitrary code.

Solution

Upgrade to InduSoft Web Studio v8.1 SP1 or later and InTouch Machine Edition 2017 v8.1 SP1 or later.

See Also

http://www.nessus.org/u?dcfab1a4

https://ics-cert.us-cert.gov/advisories/ICSA-18-107-01

Plugin Details

Severity: Critical

ID: 109280

File Name: scada_schneider_electric_iws_itme_opcode_50_stack_overflow.nbin

Version: 1.16

Type: remote

Family: SCADA

Published: 2018/04/23

Updated: 2019/08/20

Dependencies: 106229

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:schneider_electric:indusoft_web_studio, x-cpe:/a:schneider_electric:wonderware_intouch_machine_edition

Patch Publication Date: 2018/04/06

Vulnerability Publication Date: 2018/04/06

Reference Information

CVE: CVE-2018-8840

ICSA: 18-107-01

TRA: TRA-2018-07