ABB CP635 HMI

1. EXECUTIVE SUMMARY

CVSS v3 8.8
ATTENTION: Exploitable from adjacent network/low skill level to exploit
Vendor: ABB
Equipment: CP635 HMI
Vulnerability: Use of Hard-coded Credentials

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to prevent legitimate access to an affected system node, remotely cause an affected system node to stop, take control of an affected system node, or insert and run arbitrary code in an affected system node.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

ABB reports the vulnerability affects the following CP635 HMI products:

CP620, order code: 1SAP520100R0001, revision index G1 with BSP UN31 v1.76 and prior
CP620, order code: 1SAP520100R4001, revision index G1 with BSP UN31 v1.76 and prior
CP620-WEB, order code: 1SAP520200R0001, revision index G1 with BSP UN31 v1.76 and prior
CP630, order code: 1SAP530100R0001, revision index G1 with BSP UN31 v1.76 and prior
CP630-WEB, order code: 1SAP530200R0001, revision index G1 with BSP UN31 v1.76 and prior
CP635, order code: 1SAP535100R0001, revision index G1 with BSP UN31 v1.76 and prior
CP635, order code: 1SAP535100R5001, revision index G1 with BSP UN31 v1.76 and prior
CP635-B, order code: 1SAP535100R2001, revision index G1 with BSP UN31 v1.76 and prior
CP635-WEB, order code: 1SAP535200R0001, revision index G1 with BSP UN31 v1.76 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798

The ABB CP635 HMI component implements hidden administrative accounts used during the provisioning phase of the HMI interface.

CVE-2019-7225 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: Switzerland

3.4 RESEARCHER

ABB reported this vulnerability to NCCIC.

4. MITIGATIONS

ABB recommends users apply the BSP update on affected CP600 control panels at their earliest convenience.

Please see ABB cybersecurity advisory document number 3ADR010376 for more information about this vulnerability, and two other security issues and their mitigations.

NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
When remote access is required, use secure methods, such as virtual private networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.
Do not click web links or open unsolicited attachments in 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.
Only use software from trusted sources.

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability.

This product is provided subject to this Notification and this Privacy & Use policy.