Advisory Details

January 16th, 2019

Schneider Electric IIoT Monitor Hard-coded Cryptographic Key Information Disclosure Vulnerability

ZDI-19-031
ZDI-CAN-7119

CVE ID CVE-2018-7839
CVSS SCORE 6.2, (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
AFFECTED VENDORS Schneider Electric
AFFECTED PRODUCTS IIot Monitor
VULNERABILITY DETAILS

This vulnerability allows the decryption of the administrator password on vulnerable installations of Schneider Electric IIoT Monitor. Authentication is not required to exploit this vulnerability.

The specific flaw exists within encryption of the administrator password in the AESEncryption class. A hard-coded cryptographic key is used which can allow the reversal of the encryption process. An attacker can leverage this vulnerability in conjunction with other vulnerabilities to bypass authentication on the 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
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