Weintek EasyBuilder Pro cMT Series

1. EXECUTIVE SUMMARY

• CVSS v3 9.3 *ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Weintek
• Equipment: EasyBuilder Pro
• Vulnerability: Path Traversal: ‘\…\filename’

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain control of the user’s machine or gain sensitive information.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Weintek EasyBuilder Pro, a project management software, are affected:

• v6.07.01 and prior
• v6.07.02.479 and prior
• v6.08.01.349 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1 PATH TRAVERSAL: ‘\…\FILENAME’ CWE-29

The listed versions for Weintek EasyBuilder Pro are vulnerable to a ZipSlip attack caused by decompiling a malicious project file. This may allow an attacker to gain control of the user’s computer or gain access to sensitive data.

CVE-2023-0104 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

Hank Chen and Mars Cheng of PSIRT and Threat Research of TXOne Networks reported this vulnerability to CISA.

4. MITIGATIONS

Weintek recommends users implement the following mitigation techniques:

• Upgrade EasyBuilder Pro to v6.07.02.480, v6.08.01.350 or later.
• Use Decompile only on trusted sources and only when needed.

CISA 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.

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.

No known public exploits specifically target this vulnerability.