Schneider Electric C-Bus Toolkit CBZ File Parsing Directory Traversal Remote Code Execution Vulnerability

April 22nd, 2021
ZDI-21-448 ZDI-CAN-12589

CVE ID

CVE-2021-22718

CVSS Score

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

Affected Vendors

Schneider Electric

Affected Products

C-Bus Toolkit

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Schneider Electric C-Bus Toolkit. 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 CBZ files. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of the current user.

Additional Details

http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-103-01

https://us-cert.cisa.gov/ics/advisories/icsa-21-105-01


Disclosure Timeline

  • 2021-02-03 - Vulnerability reported to vendor
  • 2021-04-22 - Coordinated public release of advisory
  • 2023-09-20 - Advisory Updated

Credit

rgod

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