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Rockwell Automation SIS Workstation and ISaGRAF Workbench

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1. EXECUTIVE SUMMARY

  • CVSS v3 7.8
  • ATTENTION: Low attack complexity
  • Vendor: Rockwell Automation
  • Equipment: SIS Workstation and ISaGRAF Workbench
  • Vulnerability: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow unprivileged local users to overwrite files replacing them with malicious programs.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Rockwell Automation reports the following versions of SIS Workstation and ISaGRAF Workbench Code are affected:

  • Safety Instrumented System Workstation: v1.2 up to but not including v2.00
  • ISaGRAF Workbench: v6.6.9 up to but not including v6.06.10

3.2 Vulnerability Overview

3.2.1 Improper Input Validation CWE-20

Due to the third-party vulnerabilities in Nullsoft Scriptable Install System (NSIS), the SIS Workstation and ISaGRAF Workbench installer and uninstaller have unsafe implicit linking against Version.dll. Therefore, there is no protection mechanism in the wrapper function that resolves the dependency at an appropriate time during runtime. Also, the SIS workstation and ISaGRAF Workbench uninstaller uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which the uninstaller can be replaced by a malicious program.

CVE-2015-9268 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: United States

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