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AUSCERT External Security Bulletin Redistribution
ESB-2022.6115
Advisory (icsa-22-326-03) Phoenix Contact Automation Worx
23 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Phoenix Contact Automation Worx
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-3737 CVE-2022-3461
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-326-03
Comment: CVSS (Max): 7.8 CVE-2022-3737 (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-22-326-03)
Phoenix Contact Automation Worx
Original release date: November 22, 2022
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.8
o ATTENTION: Low attack complexity
o Vendor: Phoenix Contact
o Equipment: Automation Worx Software Suite
o Vulnerabilities: Improper Restriction of Operations within the Bounds of a
Memory Buffer, Out-of-bounds Read
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could lead to a heap buffer
overflow, release of unallocated memory, or a read access violation.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following components of Automation Worx Software Suite are affected:
o Config+: Versions 1.89 and prior
o PC Worx: Versions 1.89 and prior
o PC Worx Express: Versions 1.89 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER
CWE-119
In Phoenix Contact Automation Worx Software Suite up to version 1.89,
manipulated PC Worx or Config+ files could lead to a heap buffer overflow or a
read access violation. Availability, integrity, or confidentiality of an
application programming workstation could be compromised by attacks using these
vulnerabilities.
CVE-2022-3461 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.2 OUT-OF-BOUNDS READ CWE-125
In Phoenix Contact Automation Worx Software Suite up to version 1.89,
unauthorized users could read memory beyond the intended scope due to
insufficient validation of input data. Availability, integrity, or
confidentiality of an application programming workstation could be compromised
by attacks using these vulnerabilities.
CVE-2022-3737 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Michael Heinzl reported these vulnerabilities to CISA. CERT@VDE coordinated
these vulnerabilities with Phoenix Contact.
4. MITIGATIONS
Phoenix Contact recommends users update to the latest version of Automation
Worx Software Suite and exchange project files only via secure file exchange
services. Project files should not be exchanged via unencrypted email.
CERT@VDE has released an advisory on these vulnerabilities, accessible here .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability these vulnerabilities. Specifically, users
should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
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 at cisa.gov/ics . Several CISA products detailing cyber
defense best 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 at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities are not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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