CVE-2017-4011
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 · uneditedEmbedding Script (XSS) in HTTP Headers vulnerability in the server in McAfee Network Data Loss Prevention (NDLP) 9.3.x allows remote attackers to get session/cookie information via modification of the HTTP request.
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 · moderate confidenceMcAfee Network Data Loss Prevention (NDLP) 9.3.x contains a cross-site scripting (XSS) vulnerability in the server component where malicious scripts can be embedded in HTTP headers. Attackers can exploit this by modifying HTTP requests to inject malicious scripts that steal session/cookie information.
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<= 9.3.0CVSS 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
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/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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Confirm McAfee NDLP is installedLocate the NDLP installation directory or check system services for McAfee Network Data Loss Prevention. On Windows, verify the presence of the NDLP service. On Linux, check for /opt/McAfee/NDLP or similar installation paths.Affected if McAfee Network Data Loss Prevention is not present on the system
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Identify the installed NDLP versionCheck the NDLP server version through the web UI login page, the installation directory, or the product About section. Common locations include the management console or version info in the program files.Affected if The installed version is 9.3.x or any version <= 9.3.0
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Verify the NDLP web interface is accessibleAccess the NDLP management console URL (typically https://hostname:port) and attempt to view any page that displays HTTP header information or server responses.Affected if The web interface is exposed and displays HTTP header values without sanitization
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Inspect HTTP response headersUse browser developer tools or a command-line tool like curl to capture HTTP response headers from the NDLP server. Look for any headers that reflect input values or are displayed in the UI.Affected if The server returns headers containing unsanitized user-supplied input or reflects HTTP header values in the response
Your environment is affected if McAfee NDLP 9.3.x or <= 9.3.0 is installed and the web management interface is accessible, since the XSS flaw exists in how the server component handles HTTP headers.
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 dataImplement input validation and output encoding for all HTTP header values before rendering them in the application. Contact McAfee for the vendor patch for NDLP 9.3.x.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-4011 — 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-2017-4011 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