Advisory Details

January 16th, 2019

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

ZDI-19-032
ZDI-CAN-7120

CVE ID CVE-2018-7836
CVSS SCORE 7.2, (AV:N/AC:L/PR:H/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 required to exploit this vulnerability but authentication can be easily bypassed.

The specific flaw exists within the processing of the upload method of the UpgradeMgmt servlet, which listens on port 8080 by default. 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
  • 2019-01-16 - Coordinated public release of advisory
CREDIT rgod of 9sg Security Team - rgod@9sgsec.com
BACK TO ADVISORIES