CyberSecBulletin
CVE-2022-40693NVD status: Modified

SDS-3008 Series Industrial Ethernet Switch: Cleartext Transmission of Sensitive Information

Published Updated By the CyberSecBulletin desk

CVE-2022-40693 is a high-severity cleartext transmission of sensitive information vulnerability in SDS-3008 Series Industrial Ethernet Switch 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 SDS-3008 Series Industrial Ethernet Switch versions: 2.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.65% 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. Check which version of SDS-3008 Series Industrial Ethernet Switch 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
MoxaSDS-3008 Series Industrial Ethernet Switch2.1Not stated
MoxaSds-3008 Firmware2.1 and earlierNot stated
MoxaSds-3008-t Firmware2.1 and earlierNot stated

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 3.17.5HighNVD
CVSS 3.05.9MediumCNA (cisco.com)

Official description

A cleartext transmission vulnerability exists in the web application functionality of Moxa SDS-3008 Series Industrial Ethernet Switch 2.1. A specially-crafted network sniffing can lead to a disclosure of sensitive information. An attacker can sniff network traffic to trigger this vulnerability.

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

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in SDS-3008 Series Industrial Ethernet Switch

All SDS-3008 Series Industrial Ethernet Switch vulnerabilities

Recent Cleartext Transmission of Sensitive Information vulnerabilities

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