Security readout for executives and security teams
Plain-English summary
CVE-2018-0337 affects Cisco NX-OS role-based access controls. A logged-in local attacker could issue crafted CLI commands that may cause other users on the device to run unwanted arbitrary commands. This matters because NX-OS commonly runs critical switching infrastructure, but the provided sources do not identify affected versions or a CVSS score.
Executive priority
Prioritize validation on core switching and data center devices. The issue requires authenticated local access, lowering broad internet risk, but compromise of privileged network infrastructure can have outsized operational impact. Escalate if affected versions are confirmed or CLI access is widely distributed.
Technical view
The flaw is CWE-20 improper input validation in NX-OS role-based access checking for certain file systems. Exploitation requires authenticated local CLI access and crafted commands. Successful exploitation could indirectly make other users execute arbitrary commands on the affected device. Cisco tracks this under multiple bug IDs including CSCvd06339 and CSCvf52976.
Likely exposure
Exposure is limited to Cisco NX-OS devices where affected releases are present and attackers can obtain local authenticated CLI access. The provided bundle does not list specific versions, platforms, or fixed releases, so inventory comparison against Cisco’s advisory is required.
Exploitation context
The provided sources describe authenticated local exploitation through crafted CLI commands. They do not cite public exploitation, weaponized tooling, or CISA KEV listing. Treat active exploitation as unconfirmed based on the supplied evidence.
Researcher notes
Key gaps are missing CVSS, affected version detail, and explicit fixed-release data in the supplied bundle. The strongest grounded facts are Cisco NX-OS, authenticated local CLI vector, improper input validation, role-based access checking, and potential arbitrary command execution by other users.
Mitigation direction
- Review Cisco’s advisory for affected and fixed NX-OS releases.
- Restrict NX-OS CLI access to trusted administrative users only.
- Audit RBAC roles and remove unnecessary local privileges.
- Monitor device logs for suspicious CLI or file-system activity.
- Plan upgrades only after confirming vendor-fixed releases apply.
Validation and detection
- Inventory all Cisco NX-OS devices and running software versions.
- Compare versions and platforms against the Cisco advisory.
- Confirm who has local CLI access to each device.
- Review logs for unexpected command execution or configuration changes.
- Document whether any device matches the advisory scope.
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 lookupCVE-2018-0337 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-nxos-rbaccessCVE 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.