ICS Advisory (ICSA-19-253-01)

Delta Electronics TPEditor

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1. EXECUTIVE SUMMARY

  • CVSS v3 7.8
  • ATTENTION: Low skill level to exploit
  • Vendor: Delta Electronics
  • Equipment: TPEditor
  • Vulnerabilities: Stack-based Buffer Overflow, Heap-based Buffer Overflow, Out-of-bounds Write

2. RISK EVALUATION

Successful exploitation of these vulnerabilities may allow information disclosure, remote code execution, or may crash the application.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of TPEditor, a programming software for Delta text panels, are affected:

  • TPEditor Versions 1.94 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1    STACK-BASED BUFFER OVERFLOW CWE-121

Multiple stack-based buffer overflow vulnerabilities may be exploited by processing specially crafted project files, which may allow an attacker to remotely execute arbitrary code.

CVE-2019-13540 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.2.2    HEAP-BASED BUFFER OVERFLOW CWE-122

Multiple heap-based buffer overflow vulnerabilities may be exploited by processing specially crafted project files, which may allow an attacker to remotely execute arbitrary code.

CVE-2019-13536 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

3.2.3    OUT-OF-BOUNDS WRITE CWE-787

Multiple out-of-bounds write vulnerabilities may be exploited by processing specially crafted project files, which may allow remote code execution.

CVE-2019-13544 has been assigned to these vulnerabilities. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

kimiya of 9sg Security Team working with Trend Micro’s Zero Day Initiative (ZDI) reported these vulnerabilities to CISA.

4. MITIGATIONS

Delta Electronics recommends affected users update to the latest version of Delta Industrial Automation TPEditor, Version 1.95, which is available for download at:

http://www.deltaww.com/services/DownloadCenter2.aspx?secID=8&pid=2&tid=0&CID=06&itemID=060302&typeID=1&downloadID=&title=&dataType=8;&check=1&hl=en-US

Delta Electronics also recommends affected users restrict the interaction with the application to trusted files.
CISA recommends users take the following measures to protect themselves from 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 on us-cert.gov. 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 webpage on us-cert.gov 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 CISA for tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.


Contact Information

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