Omron CX-Supervisor

1. EXECUTIVE SUMMARY

  • CVSS v3 7.3
  • ATTENTION: Low skill level to exploit
  • Vendor: Omron
  • Equipment: CX-Supervisor
  • Vulnerabilities: Code Injection, Command Injection, Use After Free, Type Confusion

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could result in a denial-of-service condition, and/or allow an attacker to achieve code execution with privileges within the context of the application.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of CX-Supervisor are affected:

  • CX-Supervisor: Versions 3.42 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER CONTROL OF GENERATION OF CODE (‘CODE INJECTION’) CWE-94

The application can execute code that has been injected into a project file. An attacker could exploit this to execute code under the privileges of the application.

CVE-2018-19011 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

3.2.2    IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77

An attacker could inject commands to delete files and/or delete the contents of a file on the device through a specially crafted project file.

CVE-2018-19013 has been assigned to this vulnerability. A CVSS v3 base score of 5.0 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:H).

3.2.3    IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77

An attacker could inject commands to launch programs and create, write, and read files on the device through a specially crafted project file. An attacker could exploit this to execute code under the privileges of the application.

CVE-2018-19015 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

3.2.4    USE AFTER FREE CWE-416

Several use after free vulnerabilities have been identified. When processing project files, the application fails to check if it is referencing freed memory. An attacker could use a specially crafted project file to exploit and execute code under the privileges of the application.

CVE-2018-19017 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

3.2.5    ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (‘TYPE CONFUSION’) CWE-843

A type confusion vulnerability exists when processing project files. An attacker could use a specially crafted project file to exploit and execute code under the privileges of the application.

CVE-2018-19019 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Japan

 

4. MITIGATIONS

Omron has released Version 3.5.0.11 of CX-Supervisor to address the reported vulnerabilities. To be protected, development projects must be upgraded and saved in the new format, then rebuilt in the latest 3.5.0.11 format. Information on downloading the latest version of CX-Supervisor can be found at the following location:

https://www.myomron.com/index.php?action=kb&article=1711

SCS recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

  • Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
  • Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
  • When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.

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

SCS also provides a section for control systems security recommended practices on the Secnic 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 SCS for tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.

ControlByWeb X-320M

1. EXECUTIVE SUMMARY

  • CVSS v3 7.6
  • ATTENTION: Exploitable remotely/low skill level to exploit
  • Vendor: ControlByWeb
  • Equipment: X-320M
  • Vulnerabilities: Improper Authentication, Cross-site Scripting

2. RISK EVALUATION

Successful exploitation of these vulnerabilities may allow arbitrary code execution and could cause the device being accessed to require a physical factory reset to restore the device to an operational state.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of ControlByWeb X-320M, a web-enabled weather station, are affected:

  • X-320M-I firmware revision v1.05 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER AUTHENTICATION CWE-287

The software does not properly prove or insufficiently prove a claim to be correct, which may allow an attacker to cause a denial of service condition.

CVE-2018-18881 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

3.2.2    IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION (‘CROSS-SITE SCRIPTING’) CWE-79

The software does not properly validate input, which may allow arbitrary code to be executed.

CVE-2018-18882 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Information Technology
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: United States

4. MITIGATIONS

ControlByWeb has released a firmware update to address the vulnerabilities found on the X-320M that can be downloaded at:

https://www.controlbyweb.com/firmware/X320M_V1.06_firmware.zip

Additional ControlByWeb support information can be found at:

https://www.controlbyweb.com/support/

SCS recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

  • Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
  • Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
  • When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.

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

SCS 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 SCS for tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities.

Controls Recommendation

Recommended Practices

This page provides abstracts for existing recommended practices and links to the source documents. Additional supporting documents detailing a wide variety of control systems topics associated with cyber vulnerabilities and their mitigation have been developed and vetted by control systems SMEs.  These documents will be updated and topics added to address additional content and emerging issues.

Supporting Documents

Monthly Security bulletin: Critical issues closed in January

The following SAP Security Notes can patch the most severe vulnerabilities of this update:

  • 2696233: SAP Cloud Connector has several vulnerabilities (CVSS Base Score: 9.3 CVE-2019-0246CVE-2019-0247). An attacker can use a missing authentication vulnerability to get access to service and read, modify or delete information. In addition, he or she could use administrative or privileged functionalities.
    The attacker can also use an OS command execution vulnerability for unauthorized execution of operating system commands. Executed commands will run with same privileges of the service that executed a command. The hacker can access arbitrary files and directories located in an SAP server filesystem including application source code, configuration, and critical system files. It allows obtaining critical technical and business-related information stored in a vulnerable SAP system.
    Install this SAP Security Note to prevent the risks.
  • 2727624: SAP Landscape Management has an Information Disclosure vulnerability (CVSS Base Score: 9.1 CVE-2019-0249). An attacker can use an Information disclosure vulnerability to reveal additional information (e.g., system data, debugging information, etc.) which will help to explore the system and plan other attacks.
    Install this SAP Security Note to prevent the risks.
  • 2724788: Adobe PDF Print Library has multiple vulnerabilities (CVSS Base Score: 7.3). Depending on a vulnerability, an implementation flaw can result in unpredictable behavior, isuues related to system stability and safety. Patches correct configuration errors, add new functionality and improve system stability.
    Install this SAP Security Note to prevent the risks.

Microsoft SharePoint Server CVE-2019-0562 Remote Privilege Escalation Vulnerability

Risk

High

Date Discovered

January 8, 2019

Description

Microsoft SharePoint Server is prone to a remote privilege-escalation vulnerability because it fails to properly sanitize user-supplied input. An attacker may exploit this issue to gain elevated privileges. Successful exploits may aid in further attacks.

Technologies Affected

  • Microsoft SharePoint Enterprise Server 2013 Service Pack 1
  • Microsoft SharePoint Enterprise Server 2016
  • Microsoft SharePoint Server 2019

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.

Do not accept or execute files from untrusted or unknown sources.
To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Updates are available. Please see the references or vendor advisory for more information.

References