CVE-2017-8941
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 · uneditedThe Interval International app 3.3 through 3.5.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
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 confidenceThe Interval International iOS app versions 3.3 through 3.5.1 fails to validate X.509 certificates from SSL/TLS servers, allowing man-in-the-middle attackers to intercept communications by presenting fraudulent certificates and harvest sensitive user data.
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= 3.3= 3.4= 3.5= 3.5.1CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/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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Identify if Interval International iOS app is installedOn each iOS device, check the installed apps list. The app will appear as 'Interval International' in the app library or home screen.Affected if The Interval International app is present on any iOS device in the environment.
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Determine the installed app versionOpen the App Store app, search for 'Interval International', tap the app, and view the version number under the app name. Alternatively, open the app and navigate to Settings > About, or attempt to view app information through iOS device management tools if deployed via MDM.Affected if The installed version is 3.3, 3.4, 3.5, or 3.5.1.
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Compare against affected version rangeCreate an inventory of all detected app versions and compare each against the affected range: 3.3, 3.4, 3.5, and 3.5.1.Affected if Any device is running version 3.3, 3.4, 3.5, or 3.5.1 of the Interval International iOS app.
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Assess SSL/TLS certificate validation (optional advanced check)If version detection is inconclusive or if the app was obtained from a third-party source that may have been modified, perform network traffic analysis using a proxy (such as Burp Suite) with a self-signed certificate to test whether the app accepts invalid certificates.Affected if The app accepts the proxy's self-signed certificate and establishes a connection, indicating certificate validation is not properly enforced.
A user is affected if any iOS device in their environment has version 3.3, 3.4, 3.5, or 3.5.1 of the Interval International iOS app installed.
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 dataThe app must be updated to implement proper SSL/TLS certificate verification, including certificate pinning where appropriate. Users should update to the patched version of the app.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,536.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-8941 — 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-2017-8941 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