CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
17.1%
This updated advisory is a follow-up to the original advisory titled ICSA-22-069-01 Siemens RUGGEDCOM Devices (Update C) that was published November 10, 2022, to the ICS webpage on cisa.gov/ics.
Successful exploitation of this vulnerability could allow an authorized threat actor to obtain privileges to access passwords.
The following versions of RUGGEDCOM, a software platform, are affected:
The following versions of RUGGEDCOM communication equipment are affected:
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The SSH server on affected devices is configured to offer weak ciphers by default. This could allow an unauthorized attacker in a man-in-the-middle position to read and modify any data passed over the connection between legitimate clients and the affected device.
CVE-2021-37209 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H).
Michael Messner from Siemens Energy reported this vulnerability to Siemens.
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Siemens has provided a fix and recommends applying it to the following products:
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Siemens has identified the following specific workarounds users can apply to reduce the risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemensβ operational guidelines for industrial security and to follow the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.
For more information, see the associated Siemens security advisory SSA-764417 in HTML and CSAF.
For more information see Siemens Security Advisory SSA-764417
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 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 cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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 this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37209
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/csaf/ssa-764417.json
cert-portal.siemens.com/productcert/html/ssa-764417.html
cert-portal.siemens.com/productcert/pdf/ssa-764417.pdf
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-069-01
cwe.mitre.org/data/definitions/326.html
new.siemens.com/global/en/products/services/cert.html#SecurityPublications
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
support.industry.siemens.com/cs/ww/en/view/109814608/
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20RUGGEDCOM%20Devices%20%28Update%20D%29+https://www.cisa.gov/news-events/ics-advisories/icsa-22-069-01
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/recommended-practices
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H
www.instagram.com/cisagov
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www.youtube.com/@cisagov
mailto:?subject=Siemens%20RUGGEDCOM%20Devices%20%28Update%20D%29&body=www.cisa.gov/news-events/ics-advisories/icsa-22-069-01
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
17.1%