CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
40.3%
This updated advisory is a follow-up to the original advisory titled ICSA-19-255-02 3S-Smart Software Solutions GmbH CODESYS V3 Library Manager that was published September 12, 2019, to the ICS webpage on us-cert.gov.
Successful exploitation of this vulnerability may allow malicious content from manipulated libraries to be displayed or executed.
--------- Begin Update A Part 1 of 3 ---------
All 32 and 64 bit CODESYS Development System V3 versions prior to 3.5.16.0 are affected by this vulnerability.
--------- End Update A Part 1 of 3 ---------
The system displays active library content without checking the validity, which may allow the contents of manipulated libraries to be displayed or executed. The issue also exists for source libraries, but 3S-Smart Software Solutions GmbH strongly recommends distributing compiled libraries only.
CVE-2019-13538 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).
Heinz FΓΌglister of WRH Walter Reist Holding AG reported this vulnerability to 3S-Smart Software Solutions GmbH.
--------- Begin Update A Part 2 of 3 ---------
3S-Smart Software Solutions GmbH continued investigating the issue after Version 3.5.15.0 was released as an initial mitigation. They have released version 3.5.16.0 as a more complete resolution for this vulnerability in all affected CODESYS products.
--------- End Update A Part 2 of 3 ---------
Please visit the CODESYS update page for more information on how to obtain the software update: https://www.codesys.com/download/
As part of a security strategy, 3S-Smart Software Solutions GmbH recommends the following general defense measures to reduce the risk of exploits:
--------- Begin Update A Part 3 of 3 ---------
For more information, 3S-Smart Software Solutions GmbH has released a security report.
--------- End Update A Part 3 of 3 ---------
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 us-cert.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 us-cert.gov 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 CISA 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-2019-13538
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-255-02
customers.codesys.com/fileadmin/data/customers/security/CODESYS-Security-Whitepaper.pdf
customers.codesys.com/index.php?eID=dumpFile&t=f&f=12940&token=7723e5ed99830656f487e218e73dce2de751102f&download=
cwe.mitre.org/data/definitions/79.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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www.oig.dhs.gov/
www.us-cert.gov/ics
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www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
40.3%