dbcve.org
Mac Os XOperating system · Apple

CVE-2018-4258

CRITICAL · 9.8 CVSS v3.0 Published 2019-01-11
Fix available
A fix is available. Upgrade to 10.13.5 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges 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
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved bounds checking.

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 · moderate confidence

A buffer overflow vulnerability in macOS High Sierra prior to version 10.13.5 allowed memory corruption, likely enabling arbitrary code execution given the critical CVSS score. The flaw was remediated through improved bounds checking, a standard fix for buffer overflow vulnerabilities.

MitigationApply the macOS High Sierra 10.13.5 security update or later to resolve the buffer overflow vulnerability.

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:< 10.13.5

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/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, or go to Apple menu > About This Mac to view the version number
    Affected if The displayed version is 10.13.4 or lower, meaning it is older than 10.13.5
  2. Confirm macOS High Sierra edition
    Run `sw_vers -productVersion` and verify the major version starts with 10.13
    Affected if The system is running a 10.13.x version below 10.13.5

Your system is affected by CVE-2018-4258 if it runs any version of macOS High Sierra older than 10.13.5.

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.

dbcve · scoped
Upgrade available Upgrade to 10.13.5 or later
Fixed in 10.13.5
Interim mitigation

Apply the macOS High Sierra 10.13.5 security update or later to resolve the buffer overflow vulnerability.

Recommended fix High confidence

macOS High Sierra 10.13.5

  1. Check current macOS version by clicking Apple menu > About This Mac
  2. If the version shows anything below 10.13.5, click 'Software Update' to initiate the upgrade
  3. Allow the system to download and install macOS High Sierra 10.13.5 or later
  4. Restart the system when prompted to complete the installation
  5. After reboot, verify the upgrade by checking About This Mac again to confirm version 10.13.5 or higher is installed
Caveat Standard macOS upgrade considerations apply - backup important data before upgrading; some older applications may not be compatible with High Sierra

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Mac Os X Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

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-2018-4258 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