Security readout for executives and security teams
Plain-English summary
This vulnerability can let an unauthenticated network attacker crash affected Allen Bradley MicroLogix 1400 Series B controllers, halting operations. The available sources describe denial of service, not data theft or system takeover.
Executive priority
Prioritize remediation where these controllers support safety, production, or availability-sensitive processes. A successful attack can stop operations without authentication, so network exposure review and vendor guidance checks should be near-term OT work.
Technical view
CVE-2017-12089 affects Allen Bradley MicroLogix 1400 Series B FRN 21.2 and earlier. The flaw is in program download functionality. A crafted unauthenticated network packet can cause a device fault, producing high availability impact. CVSS 3.0 score is 8.6.
Likely exposure
Exposure is most relevant where affected MicroLogix 1400 controllers are reachable from untrusted networks or broad internal networks. Internet exposure, flat OT networks, and remote engineering access paths increase business risk.
Exploitation context
Sources state an unauthenticated packet can trigger the fault. The CVE bundle does not show CISA KEV listing or cited evidence of active exploitation. Treat exploitability as plausible but active exploitation as unconfirmed.
Researcher notes
The public bundle attributes the issue to Talos report TALOS-2017-0441 and describes availability-only impact. Evidence provided does not include exploit telemetry, a named patch level, or detailed vendor remediation. Avoid assuming affected models beyond MicroLogix 1400 Series B revisions listed.
Mitigation direction
- Identify affected MicroLogix 1400 Series B firmware revisions.
- Check Allen Bradley/Rockwell guidance for fixed firmware or official mitigations.
- Restrict controller access to required engineering hosts only.
- Isolate PLC networks from internet and general corporate networks.
- Prepare operational recovery procedures for unexpected controller faults.
Validation and detection
- Inventory MicroLogix 1400 Series B devices and firmware revisions.
- Confirm whether FRN 21.2 or earlier is present.
- Review network paths that can reach controller programming services.
- Check logs and maintenance records for unexplained device faults.
- Avoid disruptive validation on production PLCs.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2017-12089 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0441CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.