CyberSecBulletin
CVE-2023-5627NVD status: Modified

NPort 6000 Series: Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-5627 is a high-severity improper authentication vulnerability in NPort 6000 Series from Moxa, 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 NPort 6000 Series versions: 1.0 through 1.21. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.37% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of NPort 6000 Series you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on moxa.com for workarounds and exact fixed builds.
  3. 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
MoxaNPort 6000 Series1.0 through 1.21Not stated
Moxanport_60001.0 through 1.21Not stated
MoxaNport 6150-t Firmware1.21 and earlierNot stated
MoxaNport 6150 Firmware1.21 and earlierNot stated
MoxaNport 6250-m-sc-t Firmware1.21 and earlierNot stated
MoxaNport 6250-m-sc Firmware1.21 and earlierNot stated
MoxaNport 6250-s-sc-t Firmware1.21 and earlierNot stated
MoxaNport 6250-s-sc Firmware1.21 and earlierNot stated
MoxaNport 6250-t Firmware1.21 and earlierNot stated
MoxaNport 6250 Firmware1.21 and earlierNot stated
MoxaNport 6450-t Firmware1.21 and earlierNot stated
MoxaNport 6450 Firmware1.21 and earlierNot stated
MoxaNport 6610-16-48v Firmware1.21 and earlierNot stated
MoxaNport 6610-16 Firmware1.21 and earlierNot stated
MoxaNport 6610-32-48v Firmware1.21 and earlierNot stated
MoxaNport 6610-32 Firmware1.21 and earlierNot stated
MoxaNport 6610-8-48v Firmware1.21 and earlierNot stated
MoxaNport 6610-8 Firmware1.21 and earlierNot stated
MoxaNport 6650-16-48v Firmware1.21 and earlierNot stated
MoxaNport 6650-16-hv-t Firmware1.21 and earlierNot stated
MoxaNport 6650-16-t Firmware1.21 and earlierNot stated
MoxaNport 6650-16 Firmware1.21 and earlierNot stated
MoxaNport 6650-32-48v Firmware1.21 and earlierNot stated
MoxaNport 6650-32-hv-t Firmware1.21 and earlierNot stated
MoxaNport 6650-32 Firmware1.21 and earlierNot stated

Version data comes from the organisation that assigned the CVE; 4 further products are omitted here. 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 (moxa.com)
CVSS 3.17.5HighNVD

Official description

A vulnerability has been identified in NPort 6000 Series, making the authentication mechanism vulnerable. This vulnerability arises from the incorrect implementation of sensitive information protection, potentially allowing malicious users to gain unauthorized access to the web service.

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: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Improper Authentication vulnerabilities

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