Traffic Replay Vulnerability in Omron PLC CJ and CS Series
CVE-2019-13533

8.1HIGH

Key Information:

Vendor

Omron

Status
Omron Plc Cj And Cs Series
Vendor
CVE Published:
16 December 2019

What is CVE-2019-13533?

In Omron PLC systems, specifically the CJ and CS series, a critical vulnerability allows attackers to monitor the communication traffic between the Programmable Logic Controller (PLC) and the connected controller. By exploiting this vulnerability, an attacker can replay legitimate requests, resulting in unauthorized actions such as the unintended opening or closing of industrial valves, potentially disrupting operational safety and reliability.

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Affected Version(s)

Omron PLC CJ and CS Series Omron PLC CJ series, all versions, Omron PLC CS series, all versions

References

https://www.us-cert.gov/ics/advisories/icsa-19-346-02
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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