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1. EXECUTIVE SUMMARY

  • CVSS v3 6.6
  • ATTENTION: Low skill level to exploit
  • Vendor: Horner Automation
  • Equipment: Cscape
  • Vulnerability: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of this vulnerability could crash the device being accessed, allow the attacker to read confidential information, and may allow an attacker to remotely execute arbitrary code.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Cscape, a Control System Application programming software, are affected:

  • Cscape Version 9.80.75.3 SP3 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability has been identified that may be exploited by processing specially crafted POC files lacking user input validation. This may allow an attacker to read confidential information and remotely execute arbitrary code.

CVE-2018-19005 has been assigned to this vulnerability. A CVSS v3 base score of 6.6 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

rgod and mdm of 9SG Security Team working with Trend Micro’s Zero Day Initiative reported this vulnerability to NCCIC.

4. MITIGATIONS

Horner Automation states that only the Cscape programming software is affected. The operation of any OCS device programmed with an affected version of Cscape is not compromised.

Horner Automation recommends affected users update to the latest version of Cscape (Version 9.80 SP4), which is available for download at:

www.heapg.com or www.horner-apg.com outside of the Americas.

Users with questions regarding specific Cscape installations should contact a local Horner Automation service support team at either: techsppt@heapg.com or (+1-317-916-4274)

or tech.support@hornerirl.ie or (+353-(0)21-4321266 ext. 202) outside of the Americas.

NCCIC recommends that users take the following measures to protect themselves from social engineering attacks:

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.

 

Source:

https://ics-cert.us-cert.gov/advisories/ICSA-18-354-01