CVE-2016-6550
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 U by BB&T app 1.5.4 and earlier for iOS does not properly 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 U by BB&T iOS app versions 1.5.4 and earlier fails to properly validate X.509 certificates from SSL/TLS servers, allowing man-in-the-middle attackers to intercept encrypted communications by presenting malicious certificates and impersonate legitimate servers to steal 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<= 1.5.4CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 the installed version of the U by BB&T appOn the iOS device, open the App Store app, tap your profile icon, scroll to the U by BB&T app under 'Automatic Downloads' or 'Upcoming Automatic Updates', or open the app and navigate to Settings > About to view the version numberAffected if The displayed version is 1.5.4 or earlier (any version up to and including 1.5.4)
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Verify the exact version number in iOS SettingsGo to Settings > General > iPhone Storage (or Settings > Apps > U by BB&T on newer iOS versions), find the U by BB&T app, and note the version number listedAffected if The version shown is 1.5.4 or any version lower than 1.5.4
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Check App Store listing versionOpen the App Store, search for 'U by BB&T' or 'The U by BB&T', and view the current version displayed on the app's store pageAffected if The version shown on the App Store page is 1.5.4 or earlier
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Confirm certificate validation is vulnerableThis vulnerability is intrinsic to the app version itself - the app fails to validate X.509 certificate chains and hostname verification in all SSL/TLS connections it makesAffected if The app version is 1.5.4 or earlier, regardless of network configuration or other settings
If the installed version of the U by BB&T app is 1.5.4 or earlier, the environment is affected by improper SSL/TLS certificate validation.
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 dataUpdate the U by BB&T app to version 1.5.5 or later, which implements proper X.509 certificate chain validation including hostname verification and trust chain checks.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-6550 — 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-2016-6550 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