Security readout for executives and security teams
Plain-English summary
CVE-2019-15789 lets a low-privilege local user on a MicroK8s host escalate to root by provisioning a privileged container. For affected systems, this turns ordinary local access into full host compromise. The source bundle says the issue affects MicroK8s 1.15 and was fixed in 1.15.3.
Executive priority
Treat this as high priority where MicroK8s hosts are shared, multi-user, or developer-accessible. A low-privilege local foothold can become full host control. Single-user lab systems are lower urgency but should still be upgraded.
Technical view
This is an improper privilege management issue in Canonical MicroK8s. The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H, scoring 8.8. The reported impact is root access to the host from a low-privilege local account through privileged container provisioning.
Likely exposure
Exposure is most likely on hosts running MicroK8s 1.15 before 1.15.3, especially where non-administrative users have local access. The bundle does not identify other affected product lines or versions.
Exploitation context
The CVE is not listed as KEV in the supplied data, and the bundle does not state active exploitation. Exploitation requires local access and low privileges, so internet exposure alone is not the primary risk signal.
Researcher notes
The available evidence supports a local privilege escalation in MicroK8s 1.15, fixed in 1.15.3. Do not broaden scope beyond Canonical MicroK8s based on this bundle. Active exploitation is not supported by KEV or provided sources.
Mitigation direction
- Upgrade affected MicroK8s 1.15 deployments to 1.15.3 or later.
- Check Canonical guidance for supported package-specific remediation or backports.
- Limit local shell access on MicroK8s hosts to trusted administrators.
- Remove unnecessary local accounts from affected hosts.
- Review whether MicroK8s is still required on developer or server systems.
Validation and detection
- Inventory MicroK8s installations and record exact versions.
- Flag MicroK8s 1.15 systems below 1.15.3 as vulnerable.
- Confirm who has local access to each affected host.
- Verify remediation by checking the installed MicroK8s version after update.
- Document exceptions where upgrade timing depends on vendor-supported guidance.
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 lookupPrivilege 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-2019-15789 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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:L/UI:N/S:C/C:H/I:H/A:H26Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ubuntu/microk8s/pull/590CVE reference · x_refsource_CONFIRM
- https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-15789.htmlCVE reference · x_refsource_CONFIRM
- https://pulsesecurity.co.nz/advisories/microk8s-privilege-escalationCVE reference · x_refsource_CONFIRM
- https://discuss.kubernetes.io/t/explicit-use-of-sudo-in-microk8s-cli/7605CVE 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 Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.