3.6 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:P/A:N
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.7%
CVSS v3 7.1
**ATTENTION:**Low skill level to exploit
**Vendor:**McAfee
**Equipment:**SINAMICS PERFECT HARMONY GH180
Vulnerability: Improper Access Control
These files can be executed to compromise the HMI, and by extension, the drive system.
Siemens has analyzed the vulnerability and has determined this vulnerability applies to the following HMIs:
3.2.1 IMPROPER ACCESS CONTROL CWE-284
HMIs with this vulnerability can be compromised via local attack using removable USB storage devices to transfer malicious files. The executable files from a hard drive solidified by MACC (McAfee Application and Change Control) can be executed on the system that did not generate the inventory.
CVE-2018-6690 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
McAfee reported this vulnerability to Siemens.
McAfee has issued Security Bulletin SB10250 to address this vulnerability in MACC. SINAMICS PERFECT HARMONY GH180 Drives with HMIs produced between November 4, 2015 and October 9, 2018, use MACC as part of their software package, if option A30 was part of the order.
For compatibility reasons, Siemens advises the installation of MACC 8.2.0 instead of Version 8.0.0, hotfix 5 as mentioned in SB10250.
For the following products, Siemens recommends users upgrade to MACC v8.2.0 or greater using recommendations from McAfee to fix the vulnerability.
The update can be located here:
https://kc.mcafee.com/corporate/index?page=content&id=SB10250
For the remaining products, and until updates can be applied, Siemens recommends the following workarounds to reduce risk:
For the remaining products, and until updates can be applied, Siemens recommends the following workarounds to reduce 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 Siemensβ operational guidelines for Industrial Security (Download: <https://www.siemens.com/cert/operational-guidelines-industrial-security>), and following 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 on this vulnerability and associated software updates, please see Siemens security advisory SSA-674165 on their website:
<https://www.siemens.com/cert/advisories>
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-6690
cwe.mitre.org/data/definitions/284.html
kc.mcafee.com/corporate/index?page=content&id=SB10250
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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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:U/C:H/I:H/A:N
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www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-18-345-01
www.oig.dhs.gov/
www.siemens.com/cert/advisories
www.siemens.com/cert/operational-guidelines-industrial-security
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-345-01
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=McAfee%20SINAMICS%20PERFECT%20HARMONY%20GH180&body=www.cisa.gov/news-events/ics-advisories/icsa-18-345-01
3.6 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:P/A:N
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.7%