6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.3 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
Low
0.004 Low
EPSS
Percentile
72.2%
CVSS v3 7.3
ATTENTION: Low skill level to exploit
Vendor: Omron
Equipment: CX-Supervisor
--------- Begin Update A Part 1 of 3 --------
--------- End Update A Part 1 of 3 ----------
This updated advisory is a follow-up to the original advisory titled ICSA-19-017-01 Omron CX-Supervisor that was published January 17, 2019, on the NCCIC/ICS-CERT website.
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.
The following versions of CX-Supervisor are affected:
4.2.1 IMPROPER CONTROL OF GENERATION OF CODE (βCODE INJECTIONβ) 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).
4.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (βCOMMAND INJECTIONβ) 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).
4.2.3 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (βCOMMAND INJECTIONβ) 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).
4.2.4 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).
4.2.5 ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (βTYPE CONFUSIONβ) 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).
--------- Begin Update A Part 2 of 3 --------
4.2.6 ACCESS OF UNINITIALIZED POINTER CWE-824
An access of uninitialized pointer vulnerability could lead to type confusion 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-2018-19018 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H).
4.2.7 OUT-OF-BOUNDS READ CWE-125
When processing project files and tampering with the value of an offset, an attacker can force the application to read a value outside of an array.
CVE-2018-19020 has been assigned to this vulnerability. A CVSS v3 base score of 2.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N)
--------- End Update A Part 2 of 3 ----------
--------- Begin Update A Part 3 of 3 --------
Michael DePlante of Trend Microβs Zero Day Initiative and Esteban Ruiz (mr_me) of Source Incite, working with Trend Microβs Zero Day Initiative, reported these vulnerabilities to NCCIC.
--------- End Update A Part 3 of 3 ----------
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
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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-12-146-01BβTargeted 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 these vulnerabilities. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19011
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19013
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19015
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19017
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19018
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19019
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19020
cwe.mitre.org/data/definitions/125.html
cwe.mitre.org/data/definitions/416.html
cwe.mitre.org/data/definitions/77.html
cwe.mitre.org/data/definitions/77.html
cwe.mitre.org/data/definitions/824.html
cwe.mitre.org/data/definitions/843.html
cwe.mitre.org/data/definitions/94.html
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6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.3 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
Low
0.004 Low
EPSS
Percentile
72.2%