5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.6 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.8%
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 Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
This updated advisory is a follow-up to the original advisory titled ICSA-22-104-06 Siemens PROFINET Stack Integrated on Interniche Stack (Update D) that was published October 13, 2022, on the ICS webpage on cisa.gov/ICS.
Successful exploitation of this vulnerability could allow a denial-of-service condition.
The following products are affected:
--------- Begin Update E Part 1 of 4 ---------
--------- End Update E Part 1 of 4 ---------
--------- Begin Update E Part 2 of 4 ---------
--------- End Update E Part 2 of 4 ---------
The PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP-Header length is less than defined. This could allow an attacker to create a denial-of-service condition for TCP services on affected devices by sending specially crafted TCP segments.
CVE-2022-25622 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
Siemens reported this vulnerability to CISA.
Siemens recommends the following workarounds and mitigations users can apply to reduce risk:
--------- Begin Update E Part 3 of 4 ---------
--------- End Update E Part 3 of 4 ---------
--------- Begin Update E Part 4 of 4 ---------
--------- End Update E Part 4 of 4 ---------
Siemens has identified 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 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 further inquiries on security vulnerabilities in Siemens products and solutions, please contact Siemens.
For additional information, please refer to Siemens Security Advisory SSA-446448 - PDF Version, SSA-446448 – TXT Version, or SSA-446448 – CSAF Version.
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-12-146-01B–Targeted 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.
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/csaf/ssa-446448.json
cert-portal.siemens.com/productcert/pdf/ssa-446448.pdf
cert-portal.siemens.com/productcert/txt/ssa-446448.txt
cwe.mitre.org/data/definitions/400.html
new.siemens.com/global/en/products/services/cert.html#SecurityPublications
nvd.nist.gov/vuln/detail/CVE-2022-25622
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
signin.siemens.com/regpublic/Login.aspx?layer=false&lang=en®ionKey=ww&app=SIOS&ret=https%3A%2F%2Fsupport.industry.siemens.com%2Fcs%2Fdocument%2F109773044%2F%3Flc%3Den-ww%26_nct%3D1670619332%26si%3Dtrue
support.industry.siemens.com/cs/document/109476571/operating-system-update-cpu410-5h-process-automation?dti=0&lc=en-WW
support.industry.siemens.com/cs/document/109740119/firmware-updates-for-simatic-tdc-cpu555?dti=0&lc=en-WW
support.industry.siemens.com/cs/document/27049282/firmware-updates-for-simatic-tdc-cp51m1?dti=0&lc=en-WW
support.industry.siemens.com/cs/ww/en/view/109474550/
support.industry.siemens.com/cs/ww/en/view/109478459/
support.industry.siemens.com/cs/ww/en/view/40360647/
support.industry.siemens.com/cs/ww/en/view/40360647/
support.industry.siemens.com/cs/ww/en/view/40362228/
support.industry.siemens.com/cs/ww/en/view/40362228/
support.industry.siemens.com/cs/ww/en/view/40944925/
support.industry.siemens.com/cs/ww/en/view/40944925/
support.industry.siemens.com/cs/ww/en/view/40945128/
support.industry.siemens.com/cs/ww/en/view/44442927/
support.industry.siemens.com/cs/ww/en/view/44443101/
support.industry.siemens.com/cs/ww/en/view/47353723/
support.industry.siemens.com/cs/ww/en/view/47353723/
support.industry.siemens.com/cs/ww/en/view/47354354/
support.industry.siemens.com/cs/ww/en/view/51466769/
support.industry.siemens.com/cs/ww/en/view/51466769/
support.industry.siemens.com/cs/ww/en/view/85049260/
support.industry.siemens.com/cs/ww/en/view/85059804/
support.industry.siemens.com/cs/ww/en/view/85063017/
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20PROFINET%20Stack%20Integrated%20on%20Interniche%20Stack%20%28Update%20E%29+https://www.cisa.gov/news-events/ics-advisories/icsa-22-104-06
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics
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
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-22-104-06&title=Siemens%20PROFINET%20Stack%20Integrated%20on%20Interniche%20Stack%20%28Update%20E%29
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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-22-104-06
www.oig.dhs.gov/
www.siemens.com/cert/advisories
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-104-06
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20PROFINET%20Stack%20Integrated%20on%20Interniche%20Stack%20%28Update%20E%29&body=www.cisa.gov/news-events/ics-advisories/icsa-22-104-06
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.6 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.8%