CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
0.4%
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This updated advisory is a follow-up to the advisory update titled ICSA-20-161-04 Siemens SIMATIC, SINAMICS, SINEC, SINEMA, SINUMERIK (Update J) that was published April 14, 2022, to the ICS webpage on www.cisa.gov/ics.
Successful exploitation of this vulnerability could allow authorized local users with administrative privileges to execute custom code with SYSTEM level privileges.
The following Siemens products are affected:
--------- Begin Update K Part 2 of 2 ---------
The affected product is vulnerable due to a common component of the affected applications that regularly calls a helper binary with SYSTEM privileges while the call path is not quoted. This could allow a local unauthorized user to execute arbitrary code with SYSTEM privileges.
CVE-2020-7580 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
--------- End Update K Part 2 of 2 ---------
Ander Martinez of Titanium Industrial Security and INCIBE reported this vulnerability to Siemens.
Siemens has released updates for the following affected products and is working on further updates. For the remaining affected products, Siemens recommends specific countermeasures until fixes are available:
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Siemens has identified the following specific workarounds and mitigations that can be applied 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 the Siemens operational guidelines for Industrial Security and following the recommendations in the product manuals.
For additional information, please refer to Siemens Security Advisory SSA-312271
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.
This vulnerability is not exploitable remotely. No known public exploits specifically target this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7580
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/pdf/ssa-312271.pdf
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-20-161-04
cwe.mitre.org/data/definitions/428.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/document/109747387/
support.industry.siemens.com/cs/document/109747387/
support.industry.siemens.com/cs/document/109763890/
support.industry.siemens.com/cs/ww/de/view/109773812
support.industry.siemens.com/cs/ww/de/view/109779373
support.industry.siemens.com/cs/ww/en/109780209
support.industry.siemens.com/cs/ww/en/109807351
support.industry.siemens.com/cs/ww/en/view/10347815
support.industry.siemens.com/cs/ww/en/view/109478528
support.industry.siemens.com/cs/ww/en/view/109759753/
support.industry.siemens.com/cs/ww/en/view/109759782/
support.industry.siemens.com/cs/ww/en/view/109763892
support.industry.siemens.com/cs/ww/en/view/109775861/
support.industry.siemens.com/cs/ww/en/view/109776017/
support.industry.siemens.com/cs/ww/en/view/109776018
support.industry.siemens.com/cs/ww/en/view/109779600
support.industry.siemens.com/cs/ww/en/view/109779600
support.industry.siemens.com/cs/ww/en/view/109779992
support.industry.siemens.com/cs/ww/en/view/109780209
support.industry.siemens.com/cs/ww/en/view/109781202
support.industry.siemens.com/cs/ww/en/view/109782792
support.industry.siemens.com/cs/ww/en/view/109797645
support.industry.siemens.com/cs/ww/en/view/109801374/
support.industry.siemens.com/cs/ww/en/view/981613000
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20SIMATIC%2C%20SINAMICS%2C%20SINEC%2C%20SINEMA%2C%20SINUMERIK%20%28Update%20K%29+https://www.cisa.gov/news-events/ics-advisories/icsa-20-161-04
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
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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www.oig.dhs.gov/
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www.winccoa.com/downloads/category/patches-316.html
www.winccoa.com/downloads/category/patches-317-1.html
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CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
0.4%