SafariWeb browser · Apple
CVE-2017-2493
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 · uneditedAn issue was discovered in certain Apple products. iOS before 10.3 is affected. Safari before 10.1 is affected. iCloud before 6.2 on Windows is affected. tvOS before 10.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted elements on a web site.
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 confidenceThis is a Same Origin Policy (SOP) bypass vulnerability in WebKit affecting iOS before 10.3, Safari before 10.1, iCloud Windows before 6.2, and tvOS before 10.2. Attackers can craft malicious web page elements to access sensitive information from other origins by bypassing the SOP restriction that normally prevents cross-origin data access.
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
< 10.1< 10.3< 10.2< 6.2CVSS 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
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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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Check Safari version on macOSOpen Safari, then go to Safari menu > About Safari. Note the version number displayed.Affected if Version is below 10.1 (e.g., 10.0.x or earlier)
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Check iOS version on iPhone or iPadGo to Settings > General > About on the iOS device. Note the Version field.Affected if Version is below 10.3 (e.g., 10.2.x or earlier)
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Check tvOS version on Apple TVGo to Settings > General > About on Apple TV. Note the Version field.Affected if Version is below 10.2 (e.g., 10.1.x or earlier)
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Check iCloud for Windows versionOpen iCloud on Windows, then go to the app menu or About section to view the version number.Affected if Version is below 6.2 (e.g., 6.1.x or earlier)
If any of the installed Apple products (Safari, iOS, tvOS, or iCloud Windows) have versions below their respective fixed releases (10.1, 10.3, 10.2, 6.2), the environment is affected by this SOP bypass vulnerability.
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 data6.210.110.2
Apply vendor-supplied patches by updating affected Apple products to iOS 10.3+, Safari 10.1+, iCloud Windows 6.2+, and tvOS 10.2+ respectively.
Fix this in Safari
Scoped from the published advisory
- Consultation3.0 h
- Implementation4.0 h
- Testing2.0 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 $2,880.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2493 — 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-2017-2493 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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- 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