CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
84.7%
**ATTENTION:**Remotely exploitable/low skill level to exploit. Public exploits are available.
Vendor: Siemens
Equipment: SICAM
Vulnerabilities: Missing Authentication for Critical Function, Cross-site Scripting, Code Injection
Siemens reports that the vulnerabilities affect the following SICAM products:
Successful exploitation of these vulnerabilities could allow an unauthenticated remote attacker to execute arbitrary code.
As the web server is for diagnostics only and not required for normal operation, Siemens recommends disabling the web server after commissioning.
For users who are currently using the discontinued ETA2 (IEC 60870-5-104), MODi00 (Modbus/TCP slave) or DNPi00 (DNP3/TCP slave) firmware, Siemens recommends users upgrade to ETA4 (IEC 60870-5-104), MBSiA0 (Modbus/TCP slave) or DNPiA1 (DNP3/ TCP slave) firmware, respectively, on the SM-2558 COM Module, which is the successor to the SM-2556 Module. The upgrades are available at:
Siemens recommends users protect network access with appropriate mechanisms. Siemens also advises that users configure the operational environment according to Siemensβ Operational Guidelines for Industrial Security:
<https://www.siemens.com/cert/operational-guidelines-industrial-security>
For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-164516 at the following location:
<http://www.siemens.com/cert/advisories>
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT 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 in the ICS-CERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
The integrated web server (Port 80/TCP) of the affected devices could allow unauthenticated remote attackers to obtain sensitive device information over the network.
CVE-2017-12737 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
The integrated web server (Port 80/TCP) of the affected devices could allow cross-site scripting (XSS) attacks if unsuspecting users are tricked into clicking on a malicious link.
CVE-2017-12738 has been assigned to this vulnerability. A CVSS v3 base score of 6.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).
The integrated web server (Port 80/TCP) of the affected devices could allow unauthenticated remote attackers to execute arbitrary code on the affected device.
CVE-2017-12739 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
SEC Consult Vulnerability Lab reported these vulnerabilities directly to Siemens.
Critical Infrastructure Sectors: Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
w3.siemens.com/smartgrid/global/en/products-systems-solutions/substation-automation/substation-automation/Pages/sicam-ak-3.aspx
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-12737
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-12738
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-12739
www.siemens.com/cert/advisories
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-17-320-02
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/79.html
cwe.mitre.org/data/definitions/94.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20SICAM+https://www.cisa.gov/news-events/ics-advisories/icsa-17-320-02
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-17-320-02&title=Siemens%20SICAM
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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-17-320-02
www.oig.dhs.gov/
www.siemens.com/cert/operational-guidelines-industrial-security
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20SICAM&body=www.cisa.gov/news-events/ics-advisories/icsa-17-320-02
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
84.7%