Advisory Details

September 8th, 2021

Delta Industrial Automation DOPSoft TBK File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-21-1059
ZDI-CAN-12877

CVE ID CVE-2021-33019
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Delta Industrial Automation
AFFECTED PRODUCTS DOPSoft
VULNERABILITY DETAILS

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.

The 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.

ADDITIONAL DETAILS Delta Industrial Automation has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-21-238-04
DISCLOSURE TIMELINE
  • 2021-04-14 - Vulnerability reported to vendor
  • 2021-09-08 - Coordinated public release of advisory
CREDIT Anonymous
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