ABB Ability System 800xA

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1. EXECUTIVE SUMMARY

• CVSS v4 6.9
• ATTENTION: Low attack complexity
• Vendor: ABB
• Equipment: 800xA Base
• Vulnerabilities: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could cause services to crash and restart.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

ABB reports that the vulnerability only affects 800xA services in PC based client/server nodes. Controllers are not affected by this vulnerability:

• ABB 800xA Base: versions 6.1.1-2 and prior

3.2 Vulnerability Overview

3.2.1 Improper Input Validation CWE-20

An attacker who successfully exploited this vulnerability could cause services to crash and restart by sending specifically crafted messages.

CVE-2024-3036 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.7 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

A CVSS v4 score has also been calculated for CVE-2024-3036. A base score of 6.9 has been calculated; the CVSS vector string is (CVSS4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Dams, Energy, Food and Agriculture, Water and Wastewater Systems
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Switzerland

3.4 RESEARCHER

Uri Sade, Roman Dvorkin, Ariel Harush, Eran Jacob, and Roni Gavrilov from OTORIO reported these vulnerabilities to ABB.

4. MITIGATIONS

ABB recommends updating to an active product version to obtain the latest corrections. The problem is or will be corrected in the following product versions:

• ABB 800xA Base 6.2.0-0 (part of System 800xA 6.2.0.0)
• ABB 800xA Base 6.1.1-3 (part of System 800xA 6.1.1.2)
• ABB 800xA Base 6.0.3-x (included in next revision)

For more information, please refer to ABB's Cybersecurity Advisory 7PAA013309.

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• 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.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

• Do not click web links or open attachments in unsolicited email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.

5. UPDATE HISTORY

• June 25, 2024: Initial Publication

• ABB