CVE-2019-8663
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 · uneditedThis issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6. A remote attacker may be able to leak memory.
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 confidenceA remote attacker may be able to leak memory on vulnerable iOS and macOS devices due to insufficient validation checks in an unspecified component. The vulnerability allows memory contents to be exposed without user interaction.
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< 12.4< 10.14.6CVSS 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
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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 checksWork through these to decide whether this CVE applies to you.
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Identify the device operating systemDetermine if the device runs iOS (iPhone/iPad) or macOS. On iOS, go to Settings > General > About. On macOS, click Apple menu > About This Mac.Affected if Device is not iOS or macOS (this CVE only affects those platforms)
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Check iOS version on iPhone or iPadOn the device, go to Settings > General > About > Version. Note the version number (e.g., 12.3.5). Alternatively, connect to a computer with iTunes/Finder and check the device summary page.Affected if iOS version is lower than 12.4 (for example, 12.3.x or earlier)
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Check macOS version on Mac computersClick the Apple menu in the top-left corner, then select About This Mac. The version number appears below macOS (e.g., 10.14.5). Or run 'sw_vers' in Terminal to get the exact version.Affected if macOS version is lower than 10.14.6 (for example, 10.14.5 or earlier)
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Verify network exposure (context for exploitation)This vulnerability is exploitable remotely without user interaction. Assess whether the device has network services enabled that could accept remote connections (Wi-Fi, cellular data, Bluetooth).Affected if Device is network-connected and running a vulnerable version
The device is affected if it runs iOS versions earlier than 12.4 or macOS versions earlier than 10.14.6, regardless of network configuration, as the vulnerability can be triggered remotely without user interaction.
Generated from the published advisory. Verify against your own configuration.
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 data10.14.612.4
Update affected devices to iOS 12.4 or later, or macOS Mojave 10.14.6 or later, to apply the security patch that implements improved validation checks.
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-8663 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-8663 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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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.
- 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