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
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
50.0%
Successful exploitation of these vulnerabilities could allow an attacker to obtain credentials to the affected device and obtain complete control.
The following version of Remote Compact Controller (RCC) 972, an all-in-one I/O controller, is affected:
3.2.1 INADEQUATE ENCRYPTION STRENGTH CWE-326
The Config-files of Horner Automation’s RCC 972 with firmware version 15.40 are encrypted with weak XOR encryption vulnerable to reverse engineering. This could allow an attacker to obtain credentials to run services such as File Transfer Protocol (FTP) and Hypertext Transfer Protocol (HTTP).
CVE-2022-2640 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:H/I:N/A:N).
3.2.2 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
Horner Automation’s RCC 972 with firmware version 15.40 has a static encryption key on the device. This could allow an attacker to perform unauthorized changes to the device, remotely execute arbitrary code, or cause a denial-of-service condition.
CVE-2022-2641 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.3 EXCESSIVE RELIANCE ON GLOBAL VARIABLES CWE-1108
Horner Automation’s RCC 972 firmware version 15.40 contains global variables. This could allow an attacker to read out sensitive values and variable keys from the device.
CVE-2022-2642 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:H/I:N/A:N).
m1etz reported these vulnerabilities through the Computer Emergency Response Team, CERT-Bund, to CISA.
Horner Automation recommends that users update RCC 972 to the latest firmware available to mitigate the risk of this vulnerability:
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 at cisa.gov/ics. Several CISA products detailing cyber defense best 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 at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-2640
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-2641
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-2642
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/1108.html
cwe.mitre.org/data/definitions/321.html
cwe.mitre.org/data/definitions/326.html
hornerautomation.com/controller-firmware-cscan/
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Horner%20Automation%20Remote%20Compact%20Controller+https://www.cisa.gov/news-events/ics-advisories/icsa-22-335-02
us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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mailto:?subject=Horner%20Automation%20Remote%20Compact%20Controller&body=www.cisa.gov/news-events/ics-advisories/icsa-22-335-02
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
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
50.0%