10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 High
AI Score
Confidence
Low
0.021 Low
EPSS
Percentile
89.2%
This advisory is a follow-up to a CISA product update titled ICS-ALERT-19-225-01 Mitsubishi Electric Europe B.V. smartRTU and INEA ME-RTU (Update A) published September 10, 2019, on the ICS webpage on us-cert.cisa.gov.
Successful exploitation of these vulnerabilities could allow an attacker to gain remote code execution, obtain credentials, and use credentials found to log into other affected devices.
The following products are affected:
The affected product allows an attacker to execute arbitrary commands due to the passing of unsafe user supplied data to the system shell.
CVE-2019-14931 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
It is possible to download the affected product’s configuration file, which contains sensitive data, through the URL.
CVE-2019-14927 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
The affected product’s web configuration software allows an authenticated user to inject malicious data into the application that can then be executed in a victim’s browser, allowing stored cross-site scripting.
CVE-2019-14928 has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).
Hard-coded SSH keys have been identified in the affected product’s firmware. As the secure keys cannot be regenerated by a user and are not regenerated on firmware updates, all deployed affected products utilize the same SSH keys.
CVE-2019-14926 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The affected products contain undocumented user accounts with hard-coded password credentials. An attacker could exploit this vulnerability by using the accounts to login to affected RTU’s.
CVE-2019-14930 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The affected products store password credentials in plain text in a configuration file. An unauthenticated user can obtain the exposed password credentials to gain access to the specific services.
CVE-2019-14929 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The affected products store and reads configuration settings from a file that has insecure world-readable permissions assigned. This could allow all users on the system to read the configuration file containing usernames and plain text password combinations, as well as other sensitive configuration information of the RTU.
CVE-2019-14925 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
Mark Cross (@xerubus) reported these vulnerabilities to CISA.
Mitsubishi Electric Europe B.V. recommends users update to firmware Version 3.3 or later.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov. 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 webpage on us-cert.cisa.gov 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 CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14925
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14926
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14927
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14928
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14929
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14930
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14931
cwe.mitre.org/data/definitions/256.html
cwe.mitre.org/data/definitions/276.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/78.html
cwe.mitre.org/data/definitions/79.html
cwe.mitre.org/data/definitions/798.html
cwe.mitre.org/data/definitions/798.html
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us-cert.cisa.gov/ics
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us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01
us-cert.cisa.gov/ics/recommended-practices
us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B
us-cert.cisa.gov/ncas/tips/ST04-014
us-cert.cisa.gov/sites/default/files/publications/emailscams_0905.pdf
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 High
AI Score
Confidence
Low
0.021 Low
EPSS
Percentile
89.2%