Security readout for executives and security teams
Plain-English summary
CVE-2000-0456 is a local denial-of-service issue in NetBSD 1.4.2 and earlier. A user with local access could repeatedly trigger kernel behavior that monopolizes CPU time, making the system unresponsive. This is mainly relevant to legacy NetBSD systems still in operation.
Executive priority
Prioritize this if legacy NetBSD systems remain in production or support shared user access. The business impact is service disruption, not data theft based on available sources. If no such systems exist, treat as a low operational concern after inventory confirmation.
Technical view
The CVE describes certain NetBSD kernel system calls that do not yield the CPU, creating a “cpu-hog” condition. The available source data identifies NetBSD 1.4.2 and earlier, but provides no CVSS score, CWE, vendor advisory, patch reference, or detailed affected CPEs.
Likely exposure
Exposure is likely limited to organizations still running NetBSD 1.4.2 or earlier, especially where untrusted users have local accounts. Modern, supported systems are unlikely to be affected, but the source bundle does not provide definitive fixed-version information.
Exploitation context
No active exploitation is stated in the provided sources, and this CVE is not listed as KEV in the source bundle. The issue requires local user access, reducing remote exposure but increasing risk on shared legacy systems.
Researcher notes
Public data in the supplied bundle is sparse. The CVE description names NetBSD 1.4.2 and earlier and a local CPU-hog denial of service, but lacks scoring, patch links, technical advisories, and CPE detail. Avoid assuming affected forks or fixed versions without additional vendor evidence.
Mitigation direction
- Inventory systems for NetBSD 1.4.2 or earlier.
- Check NetBSD vendor archives or guidance for historical fixes.
- Restrict local shell access to trusted users only.
- Migrate affected legacy systems to a supported operating system.
- Monitor affected hosts for sustained CPU starvation symptoms.
Validation and detection
- Confirm operating system name and version on all NetBSD hosts.
- Identify systems allowing local interactive access by multiple users.
- Review historical NetBSD advisories for this CVE or cpu-hog issue.
- Check monitoring data for unexplained CPU saturation on legacy hosts.
- Document compensating controls where upgrade is not immediately possible.
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-2000-0456 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
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.