Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco FXOS and UCS Fabric Interconnect CLI handling. An authenticated local user could overrun the CLI parser and potentially run code as root. Business urgency is higher for environments where many administrators, shared accounts, or less-trusted operators can access device CLI.
Executive priority
Prioritize remediation for internet-edge security appliances and core fabric infrastructure, especially where CLI access is broadly delegated. Treat as high impact but not remotely reachable without credentials based on the bundle.
Technical view
Cisco describes an input-validation flaw in the CLI parser subsystem. Overlong user input can trigger a buffer overflow. Successful exploitation could execute arbitrary code with root privileges on affected Firepower 4100, Firepower 9300, and UCS 6100/6200/6300 Fabric Interconnect devices.
Likely exposure
Exposure is limited to affected Cisco FXOS and UCS Fabric Interconnect systems where an attacker already has authenticated local CLI access. The bundle does not provide affected software version ranges.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not marked KEV. Exploitation requires authenticated local access and abusive CLI input, but successful impact is root-level code execution.
Researcher notes
Evidence is incomplete: CVSS, exact affected versions, and fix details are not present in the supplied bundle. Cisco bug IDs CSCvb61099 and CSCvb86743 are listed. Avoid assuming exploit availability or patch versions without the Cisco advisory.
Mitigation direction
- Review Cisco advisory cisco-sa-20180620-fxos-ace for fixed releases and upgrade guidance.
- Inventory Firepower 4100, Firepower 9300, and UCS 6100/6200/6300 Fabric Interconnect devices.
- Restrict CLI access to trusted administrators until vendor guidance is applied.
- Remove shared or unnecessary local administrative accounts.
- Monitor privileged CLI activity on affected platforms.
Validation and detection
- Compare deployed FXOS and UCS Fabric Interconnect versions against Cisco advisory guidance.
- Confirm whether affected product families exist in production or management networks.
- Review who has authenticated local CLI access to those devices.
- Check change records for completed Cisco-recommended upgrades or mitigations.
- Validate logging covers privileged CLI sessions and administrative changes.
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.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-0302 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-fxos-aceCVE reference · x_refsource_CONFIRM
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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.