Secure Firewall Management CenterApplication · Cisco
CVE-2017-3814
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 · uneditedA vulnerability in Cisco Firepower System Software could allow an unauthenticated, remote attacker to maliciously bypass the appliance's ability to block certain web content, aka a URL Bypass. More Information: CSCvb93980. Known Affected Releases: 5.3.0 5.4.0 6.0.0 6.0.1 6.1.0.
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 confidenceA vulnerability in Cisco Firepower System Software allows an unauthenticated, remote attacker to bypass the appliance's URL filtering capabilities, potentially allowing access to web content that should be blocked. The vulnerability affects versions 5.3.0 through 6.1.0 and is rated as a medium-severity security control bypass.
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
Secure Firewall Management CenterApplication
= 5.3.0= 5.4.0= 6.0.0= 6.0.1= 6.1.0CVSS 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
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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 Cisco Secure Firewall Management Center installationLog into the Firepower Management Center web interface and navigate to System > About > Health > or check the dashboard for the appliance name and type. Alternatively, run 'show version' via CLI on the management center device.Affected if The appliance is a Cisco Firepower Management Center or Secure Firewall Management Center device
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Check installed software versionIn the web interface, go to System > About > Version to display the running software version. Via CLI, execute 'show version' and locate the 'Cisco Firepower' or 'Cisco Secure Firewall' version string.Affected if The version displayed is exactly 5.3.0, 5.4.0, 6.0.0, 6.0.1, or 6.1.0
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Verify URL filtering is configured and enabledIn the web interface, navigate to Policies > URL Filtering or Objects > Object Management > URL Category and confirm URL filtering policies are active. Check if any URL rules are defined under the access control policy applied to traffic.Affected if URL filtering is actively enabled with policies applied to traffic flows
The environment is affected if the installed version matches 5.3.0, 5.4.0, 6.0.0, 6.0.1, or 6.1.0 AND URL filtering is enabled in the Firepower Management Center.
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 dataApply the Cisco vendor patch for this vulnerability by upgrading to a fixed Firepower release. Until patched, implement compensating controls such as additional upstream/downstream filtering or manual monitoring of URL access logs for anomalies.
Fix this in Secure Firewall Management Center
Scoped from the published advisory
- Consultation4.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-3814 — 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-2017-3814 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
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