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AUSCERT External Security Bulletin Redistribution
ESB-2024.2270
ICS Advisory | ICSA-24-102-09 Rockwell Automation 5015-AENFTXT
12 April 2024
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AusCERT Security Bulletin Summary
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Product: Rockwell Automation 5015-AENFTXT
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2024-2424
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-09
Comment: CVSS (Max): 7.5 CVE-2024-2424 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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ICS Advisory (ICSA-24-102-09)
Rockwell Automation 5015-AENFTXT
Release Date
April 11, 2024
1. EXECUTIVE SUMMARY
o CVSS v4 8.7
o ATTENTION : Exploitable remotely/low attack complexity
o Vendor : Rockwell Automation
o Equipment : 5015-AENFTXT
o Vulnerability : Improper Input Validation
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to crash
the device and impact availability for the affected system.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following Rockwell Automation ethernet/IP adapter products are affected:
o 5015-AENFTXT: v35 and prior to v2.12.1
3.2 Vulnerability Overview
3.2.1 IMPROPER INPUT VALIDATION CWE-20
An input validation vulnerability exists among the affected products that
causes the secondary adapter to result in a major nonrecoverable fault (MNRF)
when malicious input is entered. If exploited, the availability of the device
will be impacted, and a manual restart is required. Additionally, a malformed
PTP packet is needed to exploit this vulnerability.
CVE-2024-2424 has been assigned to this vulnerability. A CVSS v3.1 base score
of 7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U
/C:N/I:N/A:H ).
A CVSS v4 score has also been calculated for CVE-2024-2424 . A base score of
8.7 has been calculated; the CVSS vector string is CVSS:4.0/AV:N/AC:L/AT:N/PR:N
/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N .
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Rockwell Automation reported this vulnerability to CISA.
4. MITIGATIONS
Rockwell Automation recommends users update to v2.12.1 .
Users using the affected software, who are not able to upgrade to one of the
corrected versions, are encouraged to apply Security Best Practices , where
possible.
For more information and to see Rockwell's detection rules, see Rockwell
Automation's security advisory.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability, such as:
o Minimize network exposure for all control system devices and/or systems,
ensuring they are not accessible from the internet .
o Locate control system networks and remote devices behind firewalls and
isolating them from business networks.
o When remote access is required, use more 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 the 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 on 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 .
CISA encourages organizations to implement recommended cybersecurity strategies
for proactive defense of ICS assets .
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.
No known public exploitation specifically targeting this vulnerability has been
reported to CISA at this time.
5. UPDATE HISTORY
o April 11, 2024: Initial Publication
This product is provided subject to this Notification and this Privacy & Use
policy.
Vendor
Siemens
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