Security readout for executives and security teams
Plain-English summary
Kubernetes 1.5.0 through 1.5.4 had a PodSecurityPolicy admission flaw that could let a user benefit from any existing PodSecurityPolicy object. In business terms, an intended container security boundary could be bypassed in affected clusters.
Executive priority
Treat as a targeted legacy Kubernetes risk. It is important where old 1.5.x clusters still exist, but the provided evidence is incomplete and does not support claims of active exploitation.
Technical view
The CVE describes privilege escalation in the Kubernetes PodSecurityPolicy admission plugin for versions 1.5.0-1.5.4. The impact is the ability to make use of any existing PodSecurityPolicy object. The provided sources do not include CVSS, CWE, patch details, or exploit mechanics.
Likely exposure
Exposure appears limited to Kubernetes clusters running versions 1.5.0-1.5.4 with the PodSecurityPolicy admission plugin and existing PodSecurityPolicy objects. The source bundle does not identify downstream products, managed services, or specific distributions.
Exploitation context
The source bundle does not show active exploitation, and the CVE is not listed as KEV. A public Kubernetes GitHub issue is referenced, but the provided data does not establish exploit use in the wild.
Researcher notes
Key unknowns are patch commit, exact authorization preconditions, CVSS score, and affected downstream packaging. Keep analysis tied to Kubernetes 1.5.0-1.5.4 and the PSP admission plugin unless additional vendor evidence is obtained.
Mitigation direction
- Identify Kubernetes clusters running versions 1.5.0 through 1.5.4.
- Check Kubernetes vendor guidance and the referenced issue for remediation details.
- Prioritize moving affected clusters off vulnerable versions where operationally possible.
- Review PodSecurityPolicy use and existing policy objects in affected clusters.
Validation and detection
- Inventory cluster versions and flag Kubernetes 1.5.0 through 1.5.4.
- Confirm whether the PodSecurityPolicy admission plugin is enabled.
- List existing PodSecurityPolicy objects in affected clusters.
- Review authorization and admission-control assumptions around policy use.
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.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-1000056 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://github.com/kubernetes/kubernetes/issues/43459CVE 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.