AutomationDirect DirectLOGIC with Serial Communication Cleartext Transmission
Published Aug 31, 2022
9.1
CRITICALCVSS 3.1
EPSS 0.73%
Description
AutomationDirect DirectLOGIC is vulnerable to a specifically crafted serial message to the CPU serial port that will cause the PLC to respond with the PLC password in cleartext. This could allow an attacker to access and make unauthorized changes. 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;
Affected products
-
- Version D0-06AAStatusaffectedConstraints<2.72
- Version D0-06ARStatusaffectedConstraints<2.72
- Version D0-06DAStatusaffectedConstraints<2.72
- Version D0-06DD1StatusaffectedConstraints<2.72
- Version D0-06DD1-DStatusaffectedConstraints<2.72
- Version D0-06DD2StatusaffectedConstraints<2.72
- Version D0-06DD2-DStatusaffectedConstraints<2.72
- Version D0-06DRStatusaffectedConstraints<2.72
- Version D0-06DR-DStatusaffectedConstraints<2.72
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AutomationDirect | DirectLOGIC D0-06 series CPUs | n/a |
|
Configuration 1
- < 2.72
Running on/with
- n/a
Configuration 2
- < 2.72
Running on/with
- n/a
Configuration 3
- < 2.72
Running on/with
- n/a
Configuration 4
- < 2.72
Running on/with
- n/a
Configuration 5
- < 2.72
Running on/with
- n/a
Configuration 6
- < 2.72
Running on/with
- n/a
Configuration 7
- < 2.72
Running on/with
- n/a
Configuration 8
- < 2.72
Running on/with
- n/a
Configuration 9
- < 2.72
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
AutomationDirect recommends users upgrade to firmware Version 2.72 or later, which will no longer respond with the password when requested with the specially crafted message.
Additional mitigation for brute force password access has also been added. Three incorrect password entries will result in a 3-hour lock out of password entry. Power cycle will allow subsequent password attempts.
While automation networks and systems have built-in password protection schemes, this is only one step in securing the affected systems. Automation control system networks must incorporate data protection and security measures at least as robust as a typical business computer system. AutomationDirect recommends users of PLCs, HMI products, and other SCADA system products perform independent network security analysis to determine the proper level of security required for the application.
AutomationDirect has identified the specific mitigation actions listed below:
Secure physical access. Isolate and air gap networks when possible. Consider some of the AutomationDirect newer PLC families.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
1 other source (CVE.org) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Apr 16, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.73% (0.00732) | 52.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.60% (0.00599) | 43.80th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00057) | 15.00th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.13% (0.00131) | 49.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.13% (0.00131) | 46.77th | v3 (v2023.03.01) |
| Oct 3, 2023 | 0.14% (0.00136) | 48.41th | v3 (v2023.03.01) |
| Sep 7, 2023 | 0.13% (0.00126) | 46.55th | v3 (v2023.03.01) |
| Aug 1, 2023 | 0.11% (0.00107) | 42.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00101) | 39.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 1, 2022 | 0.89% (0.00885) | 26.13th | v2 (v2022.01.01) |
References (2)
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-02 x_refsource_CONFIRMPatchThird Party AdvisoryUS Government Resource
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-03 x_refsource_CONFIRMPatchThird Party AdvisoryUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-02 | x_refsource_CONFIRMPatchThird Party AdvisoryUS Government Resource | |
| https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-03 | x_refsource_CONFIRMPatchThird Party AdvisoryUS Government Resource |
Change history (0)
No recorded changes yet.