7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8 High
AI Score
Confidence
Low
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
30.9%
This updated advisory is a follow-up to the advisory update titled ICSA-21-222-05 Siemens Industrial Products Intel CPU (Update F) that was published September 13, 2022, to the ICS webpage on www.cisa.gov/ics.
Successful exploitation of these vulnerabilities could lead to unauthorized access to sensitive data, privilege escalation, and configuration change.
The following Siemens products are affected:
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A race condition in the firmware for some Intel processors may allow a privileged user to enable escalation of privilege via local access.
CVE-2020-8670 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
Improper buffer restrictions in a subsystem in the Intel CSME versions prior to 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 14.1.53, 14.5.32, and 15.0.22 may allow a privileged user to enable escalation of privilege via local access.
CVE-2020-8703 has been assigned to this vulnerability. A CVSS v3 base score of 5.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N).
A race condition in a subsystem in the Intel LMS versions prior to 2039.1.0.0 may allow a privileged user to enable escalation of privilege via local access.
CVE-2020-8704 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
Improper initialization in the firmware for some Intel processors may allow a privileged user to enable escalation of privilege via local access.
CVE-2020-12357 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
An out-of-bounds write in the firmware for some Intel processors may allow a privileged user to cause a denial-of-service condition via local access.
CVE-2020-12358 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H).
An out-of-bounds read in the firmware for some Intel processors may allow an authenticated user to enable an escalation of privilege via local access.
CVE-2020-12360 has been assigned to this vulnerability. A CVSS v3 base score of 5.6 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N).
Improper input validation in the firmware for some Intel processors may allow an authenticated user to potentially enable a denial of service via local access.
CVE-2020-24486 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Out-of-bounds read in a subsystem in the Intel CSME versions prior to 12.0.81, 13.0.47, 13.30.17, 14.1.53, and 14.5.32 may allow a privileged user to enable information disclosure via local access.
CVE-2020-24506 has been assigned to this vulnerability. A CVSS v3 base score of 4.4 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
Improper initialization in a subsystem in the Intel CSME versions prior 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 14.1.53, 14.5.32, 13.50.11, and 15.0.22 may allow a privileged user to enable information disclosure via local access.
CVE-2020-24507 has been assigned to this vulnerability. A CVSS v3 base score of 6.0 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N).
Improper isolation of shared resources in some Intel processors may allow an authenticated user to enable information disclosure via local access.
CVE-2020-24511 has been assigned to this vulnerability. A CVSS v3 base score of 5.6 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N).
An observable timing discrepancy in some Intel processors may allow an authenticated user to enable information disclosure via local access.
CVE-2020-24512 has been assigned to this vulnerability. A CVSS v3 base score of 2.8 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N).
A domain-bypass transient execution vulnerability in some Intel Atom processors may allow an authenticated user to enable information disclosure via local access.
CVE-2020-24513 has been assigned to this vulnerability. A CVSS v3 base score of 5.6 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N).
Siemens reported these vulnerabilities to CISA.
Siemens recommends updating to the latest software version:
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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 users configure the environment according to the Siemens operational guidelines for industrial security and follow the recommendations in the product manuals.
For additional information, please refer to Siemens Security Advisory SSA-309571
CISA recommends users take defensive measures to minimize the risk of exploitation of 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 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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12357
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12358
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12360
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24486
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24506
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24507
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24511
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24512
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24513
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8670
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8703
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8704
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/pdf/ssa-309571.pdf
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
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cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/311.html
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support.industry.siemens.com/cs/ww/en/ view/109763408
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7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8 High
AI Score
Confidence
Low
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
30.9%