CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
44.4%
This updated advisory is a follow-up to the original advisory titled ICSA-22-195-18 Siemens RUGGEDCOM ROS that was published July 14, 2022, on the ICS webpage on cisa.gov/ics
Successful exploitation of this vulnerability could cause malicious behavior through legitimate user accounts accessing certain web resources on affected devices.
Siemens reports this vulnerability affects the following RUGGEDCOM ROS-based devices:
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Affected devices are vulnerable to web-based code injection attacks via the console. An attacker could exploit this vulnerability to inject code into the web server and cause malicious behavior in legitimate users accessing certain web resources on affected devices.
CVE-2022-34663 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
Aarón Flecha Menéndez and Gabriel Vía Echezarreta from S21Sec reported this vulnerability to Siemens.
Siemens has released updates for several affected products and recommends updating to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet, available.
Siemens recommends implementing the following specific workarounds and mitigations that customers can apply to reduce the risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following the recommendations in the product manuals to help ensure security within an environment.
Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity
For more information about this issue, please see Siemens’ security advisory SSA-840800
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-12-146-01B–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 this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-34663
cert-portal.siemens.com/productcert/pdf/ssa-840800.pdf
cisa.gov/ics
cisa.gov/ics
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-195-18
cwe.mitre.org/data/definitions/94.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/document/109806156/
support.industry.siemens.com/cs/document/109806156/
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support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
support.industry.siemens.com/cs/document/109806156/
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20RUGGEDCOM%20ROS%20%28Update%20A%29+https://www.cisa.gov/news-events/ics-advisories/icsa-22-195-18
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
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:R/S:U/C:H/I:H/A:H
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
44.4%