Advisory Details

April 22nd, 2021

Delta Industrial Automation CNCSoft ScreenEditor DPB File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

ZDI-21-443
ZDI-CAN-12419

CVE ID CVE-2021-22668
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 ScreenEditor
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Delta Industrial Automation CNCSoft ScreenEditor. 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 DPB files. The issue results from the lack of proper validation of user-supplied data, which can result in a read 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 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-21-110-04
DISCLOSURE TIMELINE
  • 2021-01-08 - Vulnerability reported to vendor
  • 2021-04-22 - Coordinated public release of advisory
CREDIT Natnael Samson (@NattiSamson)
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