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Mac Os XOperating system · Apple

CVE-2019-8675

HIGH · 8.8 CVSS v3.1 Published 2020-10-27
Fix available
A fix is available. Upgrade to 10.14.6 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra. An attacker in a privileged network position may be able to execute arbitrary code.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A buffer overflow vulnerability in macOS that allows an attacker with a privileged network position (e.g., man-in-the-middle) to execute arbitrary code. The issue was addressed through improved memory handling in the affected macOS versions.

MitigationApply the relevant security update (Security Update 2019-004 for High Sierra/Sierra, or update to macOS Mojave 10.14.6) to all affected systems. Prioritize systems exposed to untrusted networks.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Mac Os XOperating system
Affected:< 10.14.6

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed macOS version
    Run 'sw_vers -productVersion' in Terminal to retrieve the currently installed macOS version number
    Affected if The version returned is less than 10.14.6 (for example, 10.14.5, 10.14.4, 10.13.x, or earlier)
  2. Confirm version is in affected range
    Compare your installed version against the affected range: any macOS version below 10.14.6
    Affected if Your macOS version begins with 10.14.x where x is 0 through 5, or is an earlier major version such as 10.13.x or 10.12.x
  3. Determine network exposure context
    Evaluate whether the system is or could be subject to a privileged network position attack (e.g., man-in-the-middle on untrusted networks)
    Affected if The system connects to networks where an attacker could intercept network traffic

You are affected if your installed macOS version is below 10.14.6 and the system has network connectivity enabling a man-in-the-middle attack vector

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 10.14.6 or later
Fixed in 10.14.6
Interim mitigation

Apply the relevant security update (Security Update 2019-004 for High Sierra/Sierra, or update to macOS Mojave 10.14.6) to all affected systems. Prioritize systems exposed to untrusted networks.

Fix this in Mac Os X Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-8675 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data