CyberSecBulletin
CVE-2023-23445NVD status: Modified

SICK FTMG-ESD15AXX AIR FLOW SENSOR: Incorrect Authorization

Published Updated By the CyberSecBulletin desk

CVE-2023-23445 is a high-severity incorrect authorization vulnerability in SICK FTMG-ESD15AXX AIR FLOW SENSOR from SICK, 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. 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 0.66% chance of exploitation within 30 days, higher than 52% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

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
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.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (sick.de)
CVSS 3.17.5HighNVD

Official description

Improper Access Control in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows an unprivileged remote attacker to gain unauthorized access to data fields by using a therefore unpriviledged account via the REST interface.

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

The underlying weakness: Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

How developers prevent this class of flaw

  • Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
  • Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework and the OWASP ESAPI Access Control feature.

More Incorrect Authorization vulnerabilities (CWE-863)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, 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 Incorrect Authorization vulnerabilities

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