CyberSecBulletin
CVE-2023-23450NVD status: Modified

SICK FTMG-ESD15AXX AIR FLOW SENSOR: Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-23450 is a critical-severity improper authentication vulnerability in SICK FTMG-ESD15AXX AIR FLOW SENSOR from SICK, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected SICK FTMG-ESD15AXX AIR FLOW SENSOR versions: all firmware versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.71% chance of exploitation within 30 days, higher than 54% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Ftmg-esd20axx Firmware to 2.0 or a later version.
  2. Update Ftmg-esd25axx Firmware to 2.0 or a later version.
  3. Update Ftmg-esn40sxx Firmware to 2.0 or a later version.
  4. Read the advisory on sick.com for workarounds and exact fixed builds.
  5. 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
SICKSICK FTMG-ESD15AXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESD20AXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESD25AXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESN40SXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESN50SXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESR40SXX AIR FLOW SENSORall firmware versionsNot stated
SICKSICK FTMG-ESR50SXX AIR FLOW SENSORall firmware versionsNot stated
SickFtmg-esd20axx Firmwarebefore 2.02.0
SickFtmg-esd25axx Firmwarebefore 2.02.0
SickFtmg-esn40sxx Firmwarebefore 2.02.0
SickFtmg-esn50sxx Firmwarebefore 2.02.0
SickFtmg-esr50sxx Firmwarebefore 2.02.0
SickFtmg-esr40sxx Firmwarebefore 2.02.0
SickFtmg-esd15axx Firmwarebefore 2.02.0

Version data comes from the organisation that assigned the CVE. 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
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

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

Scoring systemScoreSeverityScored by
CVSS 3.16.2MediumCNA (sick.de)
CVSS 3.19.8CriticalNVD

Official description

Use of Password Hash Instead of Password for Authentication in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows an unprivileged remote attacker to use a password hash instead of an actual password to login to a valid user account via the REST interface.

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

The underlying weakness: Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

How developers prevent this class of flaw

  • Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

More Improper Authentication vulnerabilities (CWE-287)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in SICK FTMG-ESD15AXX AIR FLOW SENSOR

All SICK FTMG-ESD15AXX AIR FLOW SENSOR vulnerabilities

Recent Improper Authentication vulnerabilities

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