Advisory Details

January 14th, 2019

Schneider Electric IIoT Monitor SettingMgmt upload Directory Traversal Remote Code Execution Vulnerability

ZDI-19-030
ZDI-CAN-7136

CVE ID CVE-2018-7836
CVSS SCORE 9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Schneider Electric
AFFECTED PRODUCTS IIot Monitor
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Schneider Electric IIoT Monitor. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of the upload method of the SettingMgmt servlet. 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 SYSTEM.
ADDITIONAL DETAILS Schneider Electric has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-19-008-02
DISCLOSURE TIMELINE
  • 2018-08-14 - Vulnerability reported to vendor
  • 2019-01-14 - Coordinated public release of advisory
CREDIT rgod of 9sg Security Team - rgod@9sgsec.com
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