ICSA-19-136-01

icsaUScisa_csaf_ot

Schneider Electric Modicon Controllers

view advisory published 2019-05-16

Successful exploitation of this vulnerability could allow an attacker to hijack TCP connections or cause information leakage.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2019-6821USmedium6.5OT elevated—
CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when using Ethernet communication in Modicon M580 firmware version…
02

references

External citations — patches, advisories, analysis.

03

remediations (8)

  • MitigationModicon M340

    Modicon Premium and Modicon Quantum: Set up network segmentation and implement a firewall to block all unauthorized access to all TCP ports.

  • MitigationModicon M580

    Modicon Premium and Modicon Quantum: Set up network segmentation and implement a firewall to block all unauthorized access to all TCP ports.

  • MitigationModicon Premium

    Modicon Premium and Modicon Quantum: Set up network segmentation and implement a firewall to block all unauthorized access to all TCP ports.

  • MitigationModicon Quantum

    Modicon Premium and Modicon Quantum: Set up network segmentation and implement a firewall to block all unauthorized access to all TCP ports.

  • FixedModicon M340

    Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual,” in the chapter titled “Messaging Configuration Parameters,” which is available here: https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000

    https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000
  • FixedModicon M580

    Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual,” in the chapter titled “Messaging Configuration Parameters,” which is available here: https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000

    https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000
  • FixedModicon Premium

    Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual,” in the chapter titled “Messaging Configuration Parameters,” which is available here: https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000

    https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000
  • FixedModicon Quantum

    Configure the Access Control List following the recommendations of the user manual “Modicon M340 for Ethernet Communications Modules and Processors User Manual,” in the chapter titled “Messaging Configuration Parameters,” which is available here: https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000

    https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=31007131_K01_000_16.pdf&p_Doc_Ref=31007131K01000
scry

Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.

Free scan