Advisory Details

April 22nd, 2021

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

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 Schneider Electric has issued an update to correct this vulnerability. More details can be found at:
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
CREDIT rgod
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