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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.04 Low
EPSS
Percentile
92.2%
CVSS v3 9.8
**ATTENTION:**Exploitable remotely/low skill level to exploit
**Vendor:**Crestron
**Equipment:**TSW-X60 and MC3
**Vulnerabilities:**OS Command Injections, Improper Access Control, Insufficiently Protected Credentials
Successful exploitation of these vulnerabilities may allow remote code execution with escalated system privileges.
The following products and versions are affected:
3.2.1 OS COMMAND INJECTION CWE-78
This vulnerability may allow unauthenticated remote code execution via a Bash shell service in Crestron Toolbox Protocol (CTP). This vulnerability only affects TSW-X60 devices.
CVE-2018-11228 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).
3.2.2 OS COMMAND INJECTION CWE-78
The vulnerability may allow unauthenticated remote code execution via command injection in Crestron Toolbox Protocol (CTP). This vulnerability only affects TSW-X60 devices.
CVE-2018-11229 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).
3.2.3 IMPROPER ACCESS CONTROL CWE-284
The devices are shipped with authentication disabled, and there is no indication to users that they need to take steps to enable it. When compromised, the access to the CTP console is left open.
CVE-2018-10630 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).
3.2.4 INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522
The passwords for special sudo accounts may be calculated using information accessible to those with regular user privileges. Attackers could decipher these passwords, which may allow them to execute hidden API calls and escape the CTP console sandbox environment with elevated privileges.
CVE-2018-13341 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Jackson Thuraisamy, working with Security Compass, reported some of these vulnerabilities to Crestron. In addition, Ricky โHeadlessZekeโ Lawshae, working with Trend Microโs Zero Day Initiative, reported these vulnerabilities to NCCIC.
Crestron recommends users upgrade their devices to the newest firmware located at:
TSW-X60 (login required) โ <https://www.crestron.com/en-US/Software-Firmware/Firmware/Touchpanels/TSW-560-TSW-760-TSW-1060/2-001-0040-01>
MC3 (login required) โ https://www.crestron.com/en-US/Software-Firmware/Firmware/3-Series-Processors/MC3/1-502-0047-001
Crestron also recommends users refer to Crestronโs Online Help for more information about these and other vulnerabilities (Article #5471). Information for hardening devices is available in Article #5571.
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-12-146-01BโTargeted 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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-11228
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-11229
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-13341
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/522.html
cwe.mitre.org/data/definitions/78.html
cwe.mitre.org/data/definitions/78.html
nvd.nist.gov/vuln/detail/CVE-2018-10630
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Crestron%20TSW-X60%20and%20MC3+https://www.cisa.gov/news-events/ics-advisories/icsa-18-221-01
www.crestron.com/en-US/Software-Firmware/Firmware/Touchpanels/TSW-560-TSW-760-TSW-1060/2-001-0040-01
www.crestron.com/en-US/Software-Firmware/Firmware/Touchpanels/TSW-560-TSW-760-TSW-1060/2-001-0040-01
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/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: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:H/A:H
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www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-221-01
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www.youtube.com/@cisagov
mailto:?subject=Crestron%20TSW-X60%20and%20MC3&body=www.cisa.gov/news-events/ics-advisories/icsa-18-221-01
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.04 Low
EPSS
Percentile
92.2%