CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
47.6%
This updated advisory is a follow-up to the original advisory titled ICSA-21-222-03 Siemens JT2Go and Teamcenter Visualization that was published August 10, 2021, to the ICS webpage on us-cert.cisa.gov.
Successful exploitation of these vulnerabilities could result in an application crash or arbitrary code execution.
The following Siemens products are affected:
An improper check for unusual or exceptional conditions exists with the parsing DGN files from Open Design Alliance Drawings SDK, Version 2022.4 and prior, resulting from the lack of proper validation of the user-supplied data. This may result out-of-bounds conditions, allowing attackers to cause a denial-of-service condition or execute code in the context of the current process.
CVE-2021-32946 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An out-of-bounds write issue exists in the DGN file-reading procedure in the Drawings SDK, Version 2022.4 and prior, resulting from the lack of proper validation of user-supplied data. This can result in a write past the end of an allocated buffer and allow attackers to cause a denial-of-service condition or execute code in the context of the current process.
CVE-2021-32952 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
The plmxmlAdapterSE70.DLL library in affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out-of-bounds read past the end of an allocated buffer. An attacker could leverage this vulnerability to leak information in the context of the current process.
CVE-2021-33738 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).
Open Design Alliance, and Mat Powell of Trend Microβs Zero Day Initiative reported these vulnerabilities to CISA.
--------- Begin Update A Part 1 of 1 ---------
Siemens has released updates for the following products:
--------- End Update A Part 1 of 1 ---------
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens operational guidelines for industrial security and follow the recommendations in the product manuals.
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-938030
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
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 us-cert.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 us-cert.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 these vulnerabilities. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-32946
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-32952
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33738
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/pdf/ssa-938030.pdf
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-21-222-03
cwe.mitre.org/data/definitions/125.html
cwe.mitre.org/data/definitions/754.html
cwe.mitre.org/data/definitions/787.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.sw.siemens.com/
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20JT2Go%20and%20Teamcenter%20Visualization%20%28Update%20A%29+https://www.cisa.gov/news-events/ics-advisories/icsa-21-222-03
us-cert.cisa.gov/ics
us-cert.cisa.gov/ics
us-cert.cisa.gov/ics/recommended-practices
us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B
us-cert.cisa.gov/ncas/tips/ST04-014
us-cert.cisa.gov/sites/default/files/publications/emailscams_0905.pdf
us-cert.cisa.gov/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
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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www.oig.dhs.gov/
www.plm.automation.siemens.com/global/en/products/plm-components/jt2go.html
www.siemens.com/industrialsecurity
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20JT2Go%20and%20Teamcenter%20Visualization%20%28Update%20A%29&body=www.cisa.gov/news-events/ics-advisories/icsa-21-222-03
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
47.6%