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
EPSS
Percentile
57.4%
Successful exploitation of this vulnerability could lead to the software crashing; a buffer overflow condition may allow remote code execution.
Rockwell Automation reports this vulnerability affects the following versions of ThinManager ThinServer, a thin client and remote desktop protocol (RDP) server management software:
The affected product is vulnerable to a heap-based buffer overflow. An attacker could send a specifically crafted TFTP or HTTPS request, causing a heap-based buffer overflow that crashes the ThinServer process. This could expose the server to arbitrary remote code execution.
CVE-2022-38742 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
rgod, working with Trend Micro Zero Day Initiative, reported this vulnerability to Rockwell Automation and CISA.
Rockwell Automation recommends users update their products to the latest patched versions:
Rockwell Automation recommends users unable to update to the patched versions to block network access to the ThinManager TFTP and HTTPS ports from endpoints other than ThinManager managed thin clients.
Users can access security best practices at Rockwell Automationโs Knowledgebase article, QA43240 Security Best Practices.
For more information, users should see Rockwell Automationโs security advisory (login required).
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability 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-12-146-01BโTargeted 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 this vulnerability. This vulnerability has a high attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-38742
cisa.gov/ics
cisa.gov/ics
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-270-03
cwe.mitre.org/data/definitions/122.html
downloads.thinmanager.com/Files/11.0.5-ThinManager-Web.exe
downloads.thinmanager.com/Files/11.1.5-ThinManager-Web.exe
downloads.thinmanager.com/Files/11.2.6-ThinManager-Web.exe
downloads.thinmanager.com/Files/12.0.3-ThinManager-Web.exe
downloads.thinmanager.com/Files/12.1.4-ThinManager-Web.exe
downloads.thinmanager.com/Files/ThinManager 13.0.1.msp
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1085012/loc/en_US
rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1134596
twitter.com/CISAgov
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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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