CVE-2017-6032
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 Violation of Secure Design Principles issue was discovered in Schneider Electric Modicon Modbus Protocol. The Modicon Modbus protocol has a session-related weakness making it susceptible to brute-force attacks.
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 confidenceThe Modicon Modbus protocol implementation contains a session-related weakness making it susceptible to brute-force attacks. This appears to be a design flaw where session tokens or authentication mechanisms lack adequate protection against repeated login attempts, allowing attackers to potentially guess or brute-force valid session identifiers.
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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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 Modicon Modbus devices on the networkScan the network for devices running Modbus protocol on port 502, or review asset inventory for Schneider Electric Modicon controllersAffected if Any Modicon Modbus device is present on the network
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Confirm Modbus protocol is enabledVerify that the Modbus protocol interface is actively listening on the device, typically on TCP/502 or serialAffected if Modbus communication is enabled and accessible
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Check for authentication protection mechanismsReview device configuration or documentation to determine if the Modbus implementation includes brute-force protection, rate limiting, or account lockout policiesAffected if No brute-force protection, rate limiting, or account lockout is configured for Modbus sessions
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Assess session token generationExamine device documentation or conduct traffic analysis to determine if session tokens are generated with adequate entropy and randomnessAffected if Session tokens lack sufficient entropy or are predictable
Any environment with Modicon Modbus devices that have no brute-force protection, rate limiting, or strong session token generation is affected by this vulnerability.
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 rate limiting, account lockout policies, and stronger session token generation with adequate entropy on Modicon Modbus devices; consider network segmentation to limit attack surface.
- Consultation6.0 h
- Implementation8.0 h
- Testing8.0 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 $7,296.
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Free · runs locallyCheck whether your project pulls in CVE-2017-6032 — 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-2017-6032 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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