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CVE Record

CVE-2017-14467: An exploitable access control vulnerability exists in the data, program, and function file permissions func...

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: REMOTE Description: Live rung edits are able to be made by an unauthenticated user allowing for addition, deletion, or modification of existing ladder logic. Additionally, faults and cpu state modification can be triggered if specific ladder logic is used.

CriticalCVSS 10Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

This CVE affects Rockwell Allen-Bradley MicroLogix 1400 Series B controllers. An unauthenticated network attacker could read or change controller data and logic when the keyswitch is in REMOTE, potentially altering industrial process behavior.

Executive priority

Treat this as urgent for facilities using the affected PLCs. The business risk is unauthorized process change, information exposure, or controller disruption, especially where OT networks are reachable beyond trusted engineering workstations.

Technical view

CVE-2017-14467 is an access-control flaw in data, program, and function file permissions. Sources describe unauthenticated crafted packets enabling read or write operations, including live rung edits, settings changes, ladder-logic modification, faults, and CPU state changes under stated conditions.

Likely exposure

Exposure is most likely in environments running MicroLogix 1400 Series B FRN 21.2 or earlier where controllers are network-reachable and set to REMOTE. Evidence does not define broader product impact beyond the cited controller family and firmware.

Exploitation context

The bundle marks this as CVSS 10.0 and remotely reachable without authentication or user interaction. It is not listed as CISA KEV here, and the provided sources do not establish active exploitation in the wild.

Researcher notes

Keep analysis bounded to MicroLogix 1400 Series B FRN 21.2 and earlier as cited. The key operational condition is REMOTE mode. Sources support unauthenticated network-triggered read/write impact but do not provide confirmed exploitation-in-the-wild evidence.

Mitigation direction

  • Identify MicroLogix 1400 Series B firmware versions in OT inventories.
  • Check Rockwell or vendor advisories for supported firmware updates or compensating controls.
  • Restrict network access to affected controllers from untrusted systems.
  • Avoid leaving controllers in REMOTE unless operationally required.
  • Monitor for unauthorized logic or settings changes.

Validation and detection

  • Confirm controller model, Series B status, and firmware revision.
  • Verify whether affected controllers are reachable from non-OT or untrusted networks.
  • Review controller keyswitch state and operational procedures.
  • Compare deployed ladder logic and settings against known-good baselines.
  • Check logs or engineering records for unexpected edits or state changes.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2017-14467 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
10 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
10CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

10Critical
CVSS 3.0 vector shape for CVE-2017-14467Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
TalosAllen BradleyAllen Bradley Micrologix 1400 Series B FRN 21.2, Allen Bradley Micrologix 1400 Series B FRN 21.0, Allen Bradley Micrologix 1400 Series B FRN 15Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.