SafariWeb browser · Apple
CVE-2019-6227
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 · uneditedA memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 12.1.3, tvOS 12.1.2, watchOS 5.1.3, Safari 12.0.3, iTunes 12.9.3 for Windows, iCloud for Windows 7.10. Processing maliciously crafted web content may lead to arbitrary code execution.
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 confidenceMemory corruption vulnerability in Apple's web content processing components (likely WebKit) allowing arbitrary code execution via malicious web content. Triggered when processing specially crafted web pages, leading to potential complete system compromise.
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
SafariWeb browser
< 12.0.3< 12.1.3< 12.1.2< 5.1.3< 7.10< 12.9.3CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Check Safari version on macOSOpen Safari, click Safari menu > About Safari, or run 'defaults read /Applications/Safari.app/Contents/Info CFBundleShortVersionString' in TerminalAffected if Version is lower than 12.0.3
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Check iOS version on iPhone/iPadOpen Settings > General > About, look at the 'Version' fieldAffected if Version is lower than 12.1.3
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Check tvOS version on Apple TVOpen Settings > General > About > VersionAffected if Version is lower than 12.1.2
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Check watchOS version on Apple WatchOpen Watch app on paired iPhone, go to General > About, check watchOS versionAffected if Version is lower than 5.1.3
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Check iTunes versionOpen iTunes, go to iTunes > About iTunes (Windows: Help > About iTunes)Affected if Version is lower than 12.9.3
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Check iCloud for Windows versionOpen iCloud, click the gear icon > About iCloud, or check 'C:\Program Files (x86)\Common Files\Apple\Apple Application Support\iCloud\Info.plist' for CFBundleShortVersionStringAffected if Version is lower than 7.10
If any Apple product listed above is installed at a version below its fixed release (Safari 12.0.3+, iOS 12.1.3+, tvOS 12.1.2+, watchOS 5.1.3+, iTunes 12.9.3+, or iCloud 7.10+), the system is vulnerable to this flaw when processing untrusted web content.
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 data5.1.37.1012.0.3
Apply the vendor-supplied security updates: iOS 12.1.3+, tvOS 12.1.2+, watchOS 5.1.3+, Safari 12.0.3+, iTunes 12.9.3+, or iCloud for Windows 7.10+. Users should avoid untrusted websites until patches are applied.
Fix this in Safari
Scoped from the published advisory
- Consultation1.0 h
- Implementation2.0 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 $1,424.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-6227 — 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-2019-6227 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