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Rewterz Threat Advisory – ICS: Delta Industrial Automation DOPSoft TBK File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

Severity

High

Analysis Summary

CVE-2021-33019

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Delta Industrial Automation DOPSoft. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. A specific flaw exists within the parsing of TBK files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Impact

  • Code Execution
  • Unauthorized Access

Affected Vendors

  • Delta Industrial Automation

Affected Products

  • DOPSoft Version 4.00.11 and prior

Remediation

Refers to ICS-CERT for the latest update and suggested workarounds. More details can be found at:

https://us-cert.cisa.gov/ics/advisories/icsa-21-238-04