CyberSecBulletin
CVE-2022-31204NVD status: Modified

Sysmac Cs1 Firmware: Cleartext Transmission of Sensitive Information

Published Updated By the CyberSecBulletin desk

CVE-2022-31204 is a high-severity cleartext transmission of sensitive information vulnerability in Sysmac Cs1 Firmware from Omron, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 4.1 as the first without the flaw, so updating Sysmac Cs1 Firmware to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.67% chance of exploitation within 30 days, higher than 53% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Sysmac Cs1 Firmware to 4.1 or a later version.
  2. Update Sysmac Cj2m Firmware to 2.1 or a later version.
  3. Update Sysmac Cj2h Firmware to 1.5 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
OmronSysmac Cs1 Firmwarebefore 4.14.1
OmronSysmac Cj2m Firmwarebefore 2.12.1
OmronSysmac Cj2h Firmwarebefore 1.51.5
OmronSysmac Cp1e Firmwarebefore 1.301.30
OmronSysmac Cp1h Firmwarebefore 1.301.30
OmronSysmac Cp1l Firmwarebefore 1.101.10
OmronCp1w-cif41 FirmwareNot specified in the recordNot stated
OmronCx-programmerbefore 9.69.6

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.

Official description

Omron CS series, CJ series, and CP series PLCs through 2022-05-18 use cleartext passwords. They feature a UM Protection setting that allows users or system integrators to configure a password in order to restrict sensitive engineering operations (such as project/logic uploads and downloads). This password is set using the OMRON FINS command Program Area Protect and unset using the command Program Area Protect Clear, both of which are transmitted in cleartext.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Cleartext Transmission of Sensitive Information

The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

How developers prevent this class of flaw

  • Before transmitting, encrypt the data using reliable, confidentiality-protecting cryptographic protocols.
  • When using web applications with SSL, use SSL for the entire session from login to logout, not just for the initial login page.
  • When designing hardware platforms, ensure that approved encryption algorithms (such as those recommended by NIST) protect paths from security critical data to trusted user applications.

More Cleartext Transmission of Sensitive Information vulnerabilities (CWE-319)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in Sysmac Cs1 Firmware

All Sysmac Cs1 Firmware vulnerabilities

Recent Cleartext Transmission of Sensitive Information vulnerabilities

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