Security readout for executives and security teams
Plain-English summary
CVE-2018-6336 affects osquery before v3.2.7. A specially crafted macOS Universal/fat binary could appear Apple-signed to a third-party check while unsigned malicious code actually runs. Business risk is highest where endpoint policy, allowlisting, or investigations trusted osquery's signing result.
Executive priority
Prioritize remediation if osquery influenced endpoint trust, allowlisting, or incident response decisions on macOS. The urgency is lower for organizations not using affected osquery versions or not relying on its signing checks.
Technical view
The flaw is incomplete inspection of Universal/fat binaries during third-party Apple code-signing checks. The CVE rates it CVSS 7.8: local attack vector, low complexity, no privileges required, user interaction required, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to macOS environments running osquery before v3.2.7 and relying on its code-signing assessment for Universal/fat binaries. Systems not using vulnerable osquery checks are not shown affected by the provided sources.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not marked KEV. Exploitation requires a maliciously crafted local binary and user interaction, but could undermine trust decisions that treat apparent Apple signatures as safe.
Researcher notes
Evidence supports an osquery code-signing validation bypass before v3.2.7. The provided sources do not establish real-world exploitation, detailed affected platform scope beyond macOS Universal/fat binary handling, or compensating controls beyond upgrading and checking guidance.
Mitigation direction
- Upgrade osquery to v3.2.7 or later.
- Check current osquery vendor guidance before closing remediation.
- Treat prior osquery signing results for Universal/fat binaries as untrusted.
- Review allowlists or policy decisions based on vulnerable signing checks.
Validation and detection
- Inventory osquery versions across macOS endpoints.
- Identify workflows relying on osquery-reported Apple signing status.
- Confirm Universal/fat binaries receive full architecture-slice inspection.
- Review historical detections involving Apple-signed classifications before v3.2.7.
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
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.okta.com/security-blog/2018/06/issues-around-third-party-apple-code-signing-checks/CVE reference · x_refsource_MISC
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.
7PK - Security Features
7PK - Security Features represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.