Delta Electronics InfraSuite Device Master

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1. EXECUTIVE SUMMARY

• CVSS v3 9.8
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Delta Electronics
• Equipment: InfraSuite Device Master
• Vulnerabilities: Path Traversal, Deserialization of Untrusted Data, Exposed Dangerous Method or Function.

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to remotely execute arbitrary code and obtain plaintext credentials.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Delta Electronics products are affected:

• InfraSuite Device Master: Versions 1.0.7 and prior

3.2 Vulnerability Overview

3.2.1 PATH TRAVERSAL CWE-35

In Delta Electronics InfraSuite Device Master v.1.0.7, a vulnerability exists that allows an attacker to write to any file to any location of the filesystem, which could lead to remote code execution.

CVE-2023-46690 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

3.2.2 DESERIALIZATION OF UNTRUSTED DATA CWE-502

In Delta Electronics InfraSuite Device Master v.1.0.7, a vulnerability exists that allows an unauthenticated attacker to execute code with local administrator privileges.

CVE-2023-47207 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.2.3 EXPOSED DANGEROUS METHOD OR FUNCTION CWE-749

In Delta Electronics InfraSuite Device Master v.1.0.7, a vulnerability exists that allows an unauthenticated attacker to execute arbitrary code through a single UDP packet.

CVE-2023-39226 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.2.4 PATH TRAVERSAL CWE-35

In Delta Electronics InfraSuite Device Master v.1.0.7, A vulnerability exists that allows an unauthenticated attacker to disclose user information through a single UDP packet, obtain plaintext credentials, or perform NTLM relaying.

CVE-2023-47279 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:H/I:N/A:N).

3.3 BACKGROUND

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

3.4 RESEARCHER

hir0ot and Piotr Bazydlo (@chudypb) working with Trend Micro Zero Day Initiative reported these vulnerabilities to CISA.

4. MITIGATIONS

Delta Electronics recommends updating their software to v1.0.10 or later.

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

• November 28, 2023: Initial Publication

• Delta Electronics