CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
53.4%
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemensβ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to render the device unusable.
The following versions of Smart Security Manager, a software management platform, are affected:
Affected SCALANCE v1.1.0 and RUGGEDCOM v7.1.2 products with TCP Event service enabled do not properly handle malformed packets. This could allow an unauthenticated remote attacker to cause a denial-of-service condition or reboot the device, possibly affecting other network resources.
CVE-2022-31766 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
Martin Grubhofer and Michael Messner of Siemens Energy reported this vulnerability to Siemens.
Siemens has released updates for several affected products and recommends updating to the latest versions. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not, or not yet available:
Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce risk:
As a general security measure, Siemens 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 following 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 Siemens Security Advisory SSA-697140 in HTML or CSAF.
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-12-146-01BβTargeted 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-2022-31766
cert-portal.siemens.com/productcert/csaf/ssa-697140.json
cert-portal.siemens.com/productcert/html/ssa-697140.html
cisa.gov/ics
cisa.gov/ics
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-286-08
cwe.mitre.org/data/definitions/20.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/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
support.industry.siemens.com/cs/ww/en/view/109813051
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20TCP%20Event%20Service%20of%20SCALANCE%20And%20RUGGEDCOM%20Devices+https://www.cisa.gov/news-events/ics-advisories/icsa-22-286-08
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
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-22-286-08&title=Siemens%20TCP%20Event%20Service%20of%20SCALANCE%20And%20RUGGEDCOM%20Devices
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-22-286-08
www.oig.dhs.gov/
www.siemens.com/cert/operational-guidelines-industrial-security
www.siemens.com/industrialsecurity
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20TCP%20Event%20Service%20of%20SCALANCE%20And%20RUGGEDCOM%20Devices&body=www.cisa.gov/news-events/ics-advisories/icsa-22-286-08