CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:P/A:C
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
AI Score
Confidence
High
EPSS
Percentile
73.0%
--------- 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-20-042-01 Synergy Systems & Solutions HUSKY RTU that was published February 11, 2020, to the ICS webpage on us-cert.gov.
Successful exploitation of these vulnerabilities could allow an attacker to read sensitive information, execute arbitrary code, or cause a denial-of-service condition.
The following versions of HUSKY RTU, a remote terminal unit, are affected:
The affected product does not require adequate authentication, which may allow an attacker to read sensitive information or execute arbitrary code.
CVE-2019-20046 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).
Specially crafted malicious packets could cause disconnection of active authentic connections or reboot of device.
CVE-2019-20045 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:N/I:N/A:H).
--------- Begin Update A Part 2 of 3 ---------
The affected product does not require authentication for TELNET access, which may allow an attacker to change configuration or perform other malicious activities.
CVE-2019-16879 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H).
The affected product is vulnerable to specially crafted TCP packets, which can cause the device to shut down or reboot and lose configuration settings.
CVE-2020-7800 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H).
The affected product is vulnerable to information exposure over the SNMP protocol.
CVE-2020-7801 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:N/UI:N/S:U/C:L/I:L/A:N).
The affected product is vulnerable to insufficient default permissions, which could allow an attacker to view network configurations through SNMP communication.
CVE-2020-7802 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N).
--------- End Update A Part 2 of 3 ---------
The VAPT Team, C3i Center, IITK, UP, India, reported to CISA that they had coordinated these vulnerabilities directly with SSS.
SSS makes the following recommendations to mitigate risk.
--------- Begin Update A Part 3 of 3 ---------
For more information, see the associated SSS security bulletin.
--------- End Update A Part 3 of 3 ---------
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.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.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.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-16879
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-20045
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-20046
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7800
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7801
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7802
www.s3india.com/security_bulletins_rtu.html
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-20-042-01
cwe.mitre.org/data/definitions/20.html
cwe.mitre.org/data/definitions/200.html
cwe.mitre.org/data/definitions/276.html
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/754.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H
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www.oig.dhs.gov/
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:P/A:C
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
AI Score
Confidence
High
EPSS
Percentile
73.0%