Security readout for executives and security teams
Plain-English summary
This old NFS issue could let a user with local access to an affected NFS environment escalate to root-level control. The public record does not identify specific vendors or versions, so exposure depends on legacy NFS implementations still in service.
Executive priority
Treat as high priority only where legacy NFS services remain. Modern environments may have little exposure, but unidentified old NFS servers could present root compromise risk.
Technical view
CVE-1999-0084 describes improper privilege management in certain NFS servers where mknod handling could enable creation of a writable kernel-memory device and UID 0 escalation. CVSS 3.1 is 8.4, local attack vector, low complexity, no privileges, and full CIA impact.
Likely exposure
Most likely in legacy Unix or NFS server environments. The source bundle lists affected vendor, product, and versions as n/a, so vulnerability managers must map exposure through OS and NFS vendor records.
Exploitation context
The bundle does not report CISA KEV listing or active exploitation. The described impact is local privilege escalation after access to an affected NFS setup; sources do not provide current exploit prevalence.
Researcher notes
Evidence is sparse and historically dated. The CVE record gives impact and mechanism, but no affected product matrix, patch details, or active exploitation evidence. Validation should focus on vendor-specific applicability.
Mitigation direction
- Inventory NFS servers, especially unsupported or legacy Unix systems.
- Check OS and NFS vendor guidance for CVE-1999-0084 or nfs-mknod.
- Retire, patch, or isolate systems matching vendor-affected guidance.
- Restrict NFS access to trusted hosts while exposure is assessed.
- Review NFS export configuration against vendor hardening recommendations.
Validation and detection
- Identify NFS server products and exact versions in production.
- Compare findings with vendor advisories and IBM X-Force entry 78.
- Confirm whether unsupported NFS implementations remain reachable.
- Review logs and access controls for unexpected NFS usage.
- Avoid live exploit validation on production systems.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-1999-0084 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
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- nfs-mknod(78)CVE reference · vdb-entry, x_refsource_XF
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 Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.