7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.7 High
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
69.4%
CVSS v3 10.0
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Siemens
Equipment: TIM 1531 IRC
Vulnerability: Missing Authentication for Critical Function
Successful exploitation of this vulnerability could allow an attacker to perform arbitrary administrative operations.
The following versions of TIM 1531 IRCβa communication module for SIMATIC S7-1500, S7-400, and S7-300 with SINAUT ST7βare affected:
When the product is configured it is missing proper authentication on Port 102/TCP, which could allow an attacker to perform arbitrary administrative operations.
CVE-2018-13816 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
Siemens reported this vulnerability to NCCIC.
Siemens recommends upgrading to firmware v2.0, which can be downloaded from the following link:
<https://support.industry.siemens.com/cs/ww/en/view/109762596>
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
For additional information see Siemensβ security advisory SSA-982399 at the following location:
<http://www.siemens.com/cert/en/cert-security-advisories.htm>
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 following the recommendations in the product manuals.
<https://www.siemens.com/cert/operational-guidelines-industrial-security>
Additional information on Industrial Security by Siemens can be found at:
<https://www.siemens.com/Industrialsecurity>
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-2018-13816
www.siemens.com/cert/en/cert-security-advisories.htm
cwe.mitre.org/data/definitions/306.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109762596
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20TIM%201531%20IRC%20Modules+https://www.cisa.gov/news-events/ics-advisories/icsa-18-352-05
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-18-352-05&title=Siemens%20TIM%201531%20IRC%20Modules
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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-18-352-05
www.oig.dhs.gov/
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-18-352-05
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20TIM%201531%20IRC%20Modules&body=www.cisa.gov/news-events/ics-advisories/icsa-18-352-05
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.7 High
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
69.4%