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
7.8 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.1%
CVSS v3 7.5
**ATTENTION:**Exploitable remotely/low skill level to exploit
**Vendor:**Siemens
**Equipment:**SINAMICS PERFECT HARMONY GH180 Fieldbus Network
Vulnerability: Improper Input Validation
Successful exploitation of this vulnerability could cause a denial-of-service condition.
Siemens has determined this vulnerability applies to the following medium voltage converters:
3.2.1 IMPROPER INPUT VALIDATION CWE-20
An improperly configured parameter read/write execution via fieldbus network may cause the controller to restart. An attacker with access to the fieldbus network could cause a denial-of-service condition by sending specially crafted packets.
The vulnerability could be exploited by an attacker with network access to the device. Successful exploitation requires no privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the affected system.
CVE-2019-6574 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Siemens reported this vulnerability to NCCIC.
Siemens recommends users upgrade to NXGpro control. Please contact Siemens customer service to obtain and install the upgrade.
Siemens has identified the following specific workarounds and mitigations that users 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 Siemensβ operational guidelines for industrial security and to following the recommendations in the product manuals.
Additional information on Industrial Security by Siemens can be found at:
<https://www.siemens.com/industrialsecurity>
For further inquiries about security vulnerabilities in Siemens products and solutions, or for more information about this vulnerability and associated software updates (outlined in SSA-865156), please contact the Siemens ProductCERT through the website:
<https://www.siemens.com/cert/advisories>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-6574
assets.new.siemens.com/siemens/assets/public.1502968141.411e91564a2d259ecd4b6c79b51f89c044b3de81.operational-guidelines-industrial-security-en.pdf
cwe.mitre.org/data/definitions/20.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20SINAMICS%20PERFECT%20HARMONY%20GH180%20Fieldbus%20Network+https://www.cisa.gov/news-events/ics-advisories/icsa-19-134-06
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-19-134-06&title=Siemens%20SINAMICS%20PERFECT%20HARMONY%20GH180%20Fieldbus%20Network
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:H
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-19-134-06
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-19-134-06
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20SINAMICS%20PERFECT%20HARMONY%20GH180%20Fieldbus%20Network&body=www.cisa.gov/news-events/ics-advisories/icsa-19-134-06
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
7.8 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.1%