Advisory Details

January 14th, 2021

Delta Industrial Automation CNCSoft-B DOPSoft DPA File Parsing Type Confusion Remote Code Execution Vulnerability

ZDI-21-045
ZDI-CAN-11795

CVE ID CVE-2020-27293
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 CNCSoft-B
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Delta Industrial Automation CNCSoft-B. 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 DPA files by the DOPSoft program. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. 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-21-007-04
DISCLOSURE TIMELINE
  • 2020-08-26 - Vulnerability reported to vendor
  • 2021-01-14 - Coordinated public release of advisory
CREDIT kimiya
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