CVE-2018-4015
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 exploitable vulnerability exists in the HTTP client functionality of the Webroot BrightCloud SDK. The configuration of the HTTP client does not enforce a secure connection by default, resulting in a failure to validate TLS certificates. An attacker could impersonate a remote BrightCloud server to exploit this vulnerability.
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 Webroot BrightCloud SDK contains an insecure HTTP client configuration that fails to validate TLS certificates, allowing an attacker to perform a man-in-the-middle attack and impersonate the BrightCloud server.
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 dataall versionsCVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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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Identify BrightCloud SDK usageSearch your codebase, dependencies, or installed packages for 'BrightCloud', 'brightcloud', or the Webroot SDK. Review any import statements or library references that include BrightCloud functionality.Affected if The BrightCloud SDK or any product/library relying on it is present in the environment.
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Locate HTTP client configurationFind the HTTP client code or configuration file that the BrightCloud SDK uses to make outbound HTTPS connections. Search for HTTP client initialization, HTTP libraries (like urllib, requests, Apache HttpClient, OkHttp), or network configuration.Affected if Custom HTTP client configuration exists that overrides the default secure behavior.
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Check for disabled certificate validationInspect the HTTP client code for patterns that disable TLS verification, such as: setting verify=False, creating an unverified SSL context, using TRUST_ALL_BYPASS, or implementing a custom HostnameVerifier/TrustManager that accepts all certificates.Affected if The code explicitly disables certificate chain validation or hostname verification.
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Inspect custom trust store settingsReview any custom TrustManager, KeyStore, or certificate store configuration passed to the HTTP client. Look for implementations that override default validation logic or accept self-signed/untrusted certificates.Affected if A custom TrustManager is configured that bypasses standard certificate validation.
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Verify network traffic inspection capabilityIf available, use a network proxy or TLS inspection tool to observe whether the BrightCloud connection accepts certificates that fail standard validation (expired, self-signed, mismatched hostname).Affected if The SDK accepts connections to the BrightCloud server with invalid or untrusted TLS certificates.
You are affected if the Webroot BrightCloud SDK is in use and its HTTP client configuration disables or bypasses TLS certificate chain or hostname 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 dataConfigure the HTTP client to enforce TLS certificate validation by properly validating the certificate chain and hostname before accepting any connection to the remote server.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 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 $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-4015 — 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-2018-4015 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
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