DirectLOGIC D0-06 series CPUs: Cleartext Transmission of Sensitive Information
CVE-2022-2003 is a critical-severity cleartext transmission of sensitive information vulnerability in DirectLOGIC D0-06 series CPUs from AutomationDirect, with a CVSS 3.1 base score of 9.1 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 0.77% chance of exploitation within 30 days, higher than 56% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update DirectLOGIC D0-06 series CPUs to 2.72 or a later version.
- Update D0-06dd1 Firmware to 2.72 or a later version.
- Update D0-06dd2 Firmware to 2.72 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| AutomationDirect | DirectLOGIC D0-06 series CPUs | D0-06DD1 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 ranges | 2.72 |
| Automationdirect | D0-06dd1 Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06dd2 Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06dr Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06da Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06ar Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06aa Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06dd1-d Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06dd2-d Firmware | before 2.72 | 2.72 |
| Automationdirect | D0-06dr-d Firmware | before 2.72 | 2.72 |
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
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.7 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 9.1 | Critical | NVD |
Official 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;
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
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- cisa.gov/uscert/ics/advisories/icsa-22-167-02Third Party Advisory, US Government Resource
- cisa.gov/uscert/ics/advisories/icsa-22-167-03Third Party Advisory, US Government Resource
Other vulnerabilities in DirectLOGIC D0-06 series CPUs
- 7.5 High severity
Recent Cleartext Transmission of Sensitive Information vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 8.2 High severity
- 7.5 High severity
- 7.5 High severity
- 9.8 Critical severity
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