Advisory Details

August 9th, 2021

(0Day) Delta Industrial Automation DOPSoft XLS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-960
ZDI-CAN-13127

CVE ID CVE-2021-38406
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 XLS files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

03/10/20 - ZDI reported the vulnerability to ICS-CERT
03/11/20 - ICS-CERT confirmed receipt of the report
07/12/21 - ZDI requested an update
07/23/21 - ICS-CERT requested an extension
07/23/21 - ZDI notified ICS-CERT of the intention to publish this report as a 0-day advisory on 08/03/21


DISCLOSURE TIMELINE
  • 2021-03-10 - Vulnerability reported to vendor
  • 2021-08-09 - Coordinated public release of advisory
CREDIT kimiya
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