CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
40.0%
Successful exploitation of these vulnerabilities could allow an attacker to delete arbitrary files from this system, fetch arbitrary files, or perform arbitrary write operations.
B&R Automation reports the vulnerabilities affect the following versions of Automation Studio:
A privilege escalation vulnerability in the upgrade service in B&R Automation Studio could allow authenticated users to delete arbitrary files via an exposed interface.
CVE-2019-19100 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H).
A missing secure communication definition and an incomplete TLS validation in the upgrade service in B&R Automation Studio enable unauthenticated users to perform MITM attacks via the B&R upgrade server.
CVE-2019-19101 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).
A directory traversal vulnerability in SharpZipLib used in the upgrade service in B&R Automation Studio allow unauthenticated users to write to certain local directories. The vulnerability is also known as “zip slip.”
CVE-2019-19102 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).
Yehuda Anikster and Amir Preminger of Claroty reported these vulnerabilities to B&R Industrial Automation.
B&R recommends applying product updates at the earliest convenience. Users of Automation Studio Versions 4.0.x, 4.1.x, and 4.2.x are advised to upgrade to a newer version of Automation Studio.
B&R recommends the following workarounds until users can upgrade to a newer version:
Users may approach their local B&R service organization in case of questions.
For more information related to these vulnerabilities, please refer to the B&R advisory.
For additional information and support, please contact B&R service.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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-12-146-01B–Targeted 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 these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-19100
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-19101
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-19102
www.br-automation.com/
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-20-093-01
cwe.mitre.org/data/definitions/22.html
cwe.mitre.org/data/definitions/269.html
cwe.mitre.org/data/definitions/325.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=B%26R%20Automation%20Studio+https://www.cisa.gov/news-events/ics-advisories/icsa-20-093-01
www.br-automation.com/en-gb/service/cyber-security/
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-20-093-01&title=B%26R%20Automation%20Studio
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
www.instagram.com/cisagov
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www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-20-093-01
www.oig.dhs.gov/
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/alerts/ICS-ALERT-10-301-01
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
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=B%26R%20Automation%20Studio&body=www.cisa.gov/news-events/ics-advisories/icsa-20-093-01
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
40.0%