FortiosOperating system · Fortinet
CVE-2019-15705
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 Improper Input Validation vulnerability in the SSL VPN portal of FortiOS versions 6.2.1 and below, and 6.0.6 and below may allow an unauthenticated remote attacker to crash the SSL VPN service by sending a crafted POST 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 · high confidenceImproper input validation in FortiOS SSL VPN portal allows unauthenticated remote attackers to crash the VPN service via crafted POST requests. The vulnerability affects versions 6.2.1 and below, and 6.0.6 and below.
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
FortiosOperating system
<= 6.0.6>= 6.2.0, <= 6.2.1CVSS 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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Check FortiOS versionLog into the FortiGate CLI and run 'get system status' to display the firmware version, or check the web UI dashboard for the FortiOS version displayed.Affected if The displayed version is 6.0.6 or below, or is between 6.2.0 and 6.2.1 inclusive.
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Verify SSL VPN portal is enabledIn the FortiGate CLI, run 'get vpn ssl settings' to check if SSL-VPN is configured and enabled. Look for 'set status enable' in the output.Affected if SSL-VPN status shows as enabled.
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Confirm SSL VPN web portal is accessibleAttempt to reach the SSL VPN portal URL (typically /sslvpn/hostcheck.html or /remote/login) from an external interface to verify the service is exposed.Affected if The SSL VPN web portal is reachable from untrusted networks.
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Review SSL VPN logs for crash eventsIn the FortiGate CLI, run 'execute log filter category 24' to set the VPN category, then 'execute log display' to view recent SSL VPN events. Look for sudden service interruptions or crash indicators around the time of suspicious POST requests.Affected if Logs show unexpected SSL VPN service restarts or crash events without corresponding legitimate cause.
A system is affected if it runs FortiOS version 6.0.6 or below, or 6.2.0-6.2.1, and has SSL-VPN portal enabled and accessible.
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 dataUpgrade FortiOS to version 6.0.7 or later for the 6.0.x branch, or 6.2.2 or later for the 6.2.x branch to patch the input validation vulnerability.
Fix this in Fortios
Scoped from the published advisory
- Consultation3.0 h
- Implementation2.0 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 $2,832.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-15705 — 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-2019-15705 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
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