CyberSecBulletin
CVE-2022-2004NVD status: Modified

DirectLOGIC D0-06 series CPUs: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2022-2004 is a high-severity uncontrolled resource consumption vulnerability in DirectLOGIC D0-06 series CPUs from AutomationDirect, 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 2.72 as the first without the flaw, so updating DirectLOGIC D0-06 series CPUs to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.03% chance of exploitation within 30 days, higher than 64% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update DirectLOGIC D0-06 series CPUs to 2.72 or a later version.
  2. Update D0-06dd1 Firmware to 2.72 or a later version.
  3. Update D0-06dd2 Firmware to 2.72 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
AutomationDirectDirectLOGIC D0-06 series CPUsD0-06DD1 up to, but not including, 2.72; D0-06DD2 up to, but not including, 2.72; D0-06DR up to, but not including, 2.72; D0-06DA up to, but not including, 2.72; D0-06AR up to, but not including, 2.72; D0-06AA up to, but not including, 2.72; D0-06DD1-D up to, but not including, 2.72; D0-06DD2-D up to, but not including, 2.72; and 1 more ranges2.72
AutomationdirectD0-06dd1 Firmwarebefore 2.722.72
AutomationdirectD0-06dd2 Firmwarebefore 2.722.72
AutomationdirectD0-06dr Firmwarebefore 2.722.72
AutomationdirectD0-06da Firmwarebefore 2.722.72
AutomationdirectD0-06ar Firmwarebefore 2.722.72
AutomationdirectD0-06aa Firmwarebefore 2.722.72
AutomationdirectD0-06dd1-d Firmwarebefore 2.722.72
AutomationdirectD0-06dd2-d Firmwarebefore 2.722.72
AutomationdirectD0-06dr-d Firmwarebefore 2.722.72

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
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (hq.dhs.gov)
CVSS 3.17.5HighNVD

Official description

AutomationDirect DirectLOGIC is vulnerable to a a specially crafted packet can be sent continuously to the PLC to prevent access from DirectSoft and other devices, causing a denial-of-service condition. This issue affects: AutomationDirect DirectLOGIC D0-06 series CPUs D0-06DD1 versions prior to 2.72; D0-06DD2 versions prior to 2.72; D0-06DR versions prior to 2.72; D0-06DA versions prior to 2.72; D0-06AR versions prior to 2.72; D0-06AA versions prior to 2.72; D0-06DD1-D versions prior to 2.72; D0-06DD2-D versions prior to 2.72; D0-06DR-D versions prior to 2.72;

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

The underlying weakness: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How developers prevent this class of flaw

  • Ensure that protocols have specific limits of scale placed on them.
  • Ensure that all failures in resource allocation place the system into a safe posture.

More Uncontrolled Resource Consumption vulnerabilities (CWE-400)

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

Patches and release notes

Other vulnerabilities in DirectLOGIC D0-06 series CPUs

All DirectLOGIC D0-06 series CPUs vulnerabilities

Recent Uncontrolled Resource Consumption vulnerabilities

Spotted an error? Tell us.