Delta Electronics InfraSuite Device Master CtrlLayerNWCmd_FileOperation Directory Traversal Arbitrary File Deletion Vulnerability

January 18th, 2023
ZDI-23-085 ZDI-CAN-19417

CVE ID

CVE-2022-41657

CVSS Score

7.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Affected Vendors

Delta Electronics

Affected Products

InfraSuite Device Master

Vulnerability Details

This vulnerability allows remote attackers to delete arbitrary files on affected installations of Delta Electronics InfraSuite Device Master. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the CtrlLayerNWCmd_FileOperation function. When parsing the fileName element, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to delete files in the context of an administrator.

Additional Details

Delta Electronics has issued an update to correct this vulnerability. More details can be found at:
https://www.cisa.gov/uscert/ics/advisories/icsa-22-298-07

Disclosure Timeline

  • 2022-11-10 - Vulnerability reported to vendor
  • 2023-01-18 - Coordinated public release of advisory

Credit

Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative

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